This is 7th grade math
Answer:
15 feet squared
Step-by-step explanation:
Area = 6 x 5 x 1/2
Area = 30 x 1/2
Area = 15
Hope that helps!
200 students in a high school senior class are surveyed about what majors they intend to declare in college. Of the 200 students, 80 plan to major in mathematics, 100 plan to major in computer science, and 30 plan to pursue a double major in mathematics and computer science. Using this information, answer each of the following questions.
Let MMM be the event that a randomly selected student plans to major in mathematics and CCC be the event that a randomly selected student plans to major in computer science.
Khan academy adding probabilities
Answer:
Why is the number so big
Step-by-step explanation:
Answer:
2/5
1/2
3/20
3/4
Step-by-step explanation:
got it from Khan academy :)
if (x-y)=15 what is the value of x^2 -2xy+y^2
Answer:
=225
Step-by-step explanation:
The value of x² - 2xy + y² would be; 225
What is the algebraic expression?Algebraic expressions are mathematical statements with a minimum of two terms containing variables or numbers.
we are given that (x-y)=15
The identity (x + y)² - (x - y)² = 4xy.
(x + y)²= (x² + 2xy + y²)
we have been asked to find x² - 2xy + y²
x² - 2xy + y² = (x - y)²
x² - 2xy + y² = 15²
x² - 2xy + y² = 225
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In which of the expressions below will x = 25? Select all that apply.
Answer:
Option C
Option D
Step-by-step explanation:
We have to calculate each expression to find for which one is the solution is x=25.
A)
[tex] \frac{x + 6}{3} = 10 \\ x + 6 = 10 \: . \: 3 \\ x + 6 = 30 \\ x = 30 - 6 \\ x = 24[/tex]
B)
[tex]x - 8 = 32 \\ x = 32 + 8 \\ x= 40[/tex]
C)
[tex]6x - (15 + 4x) = 35 \\ 6x - 15 - 4x = 35 \\ 2x = 35 + 15 \\ 2x = 50 \\ x = \frac{50}{2} \\ x = 25[/tex]
D)
[tex] \frac{3x}{5} = 15 \\ 3x = 15 \: . \: 5 \\ 3x = 75 \\ x = \frac{75}{3} \\ x = 25[/tex]
E)
[tex]4(x - 18) = 12 \\ x - 18 = \frac{12}{4} \\ x - 18 = 3 \\ x = 3 + 18 \\ x = 21[/tex]
what is the perimeter of this polygon?
Answer:
Step-by-step explanation:
Did you try adding it all up and combine the like terms to get your answer
Identify slope (m) and y-intercept (b): 4y - 3x = 4*
1. m = 4/3 b = 4
2. m = 3/4 b = 1
3. m=-3 b = 4
4. m = 3/4 b = 4
Answer:
2.
Step-by-step explanation:
y = 3/4x +1
m = 3/4 b = 1
hope this helps
5x+y=-19 5x-4y=-24
Help pls
Answer:
x= 4 and y=1
Step-by-step explanation:
to solve this you could either use substitution or elimination. elimination would be best her because both 'x's have the same number. subtract the equations from eahh other and solve for y, then substitute the y and solve for x
The system of equations are solved and x = -4 and y = 1
What is an Equation?Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
It demonstrates the equality of the relationship between the expressions printed on the left and right sides.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given data ,
Let the equation be represented as A
Now , the value of A is
Substituting the values in the equation , we get
To solve the system of equations:
5x + y = -19 (Equation 1)
5x - 4y = -24 (Equation 2)
Let's use the elimination method in this case.
Step 1: Multiply Equation 1 by 4 and Equation 2 by 1 to eliminate y.
4(5x + y) = 4(-19)
5x - 4y = -24
20x + 4y = -76 (Equation 1 multiplied by 4)
5x - 4y = -24 (Equation 2 multiplied by 1)
Step 2: Add the equations together to eliminate y.
20x + 4y + 5x - 4y = -76 - 24
25x = -100
x = -100 / 25
x = -4
Step 3: Substitute the value of x into either Equation 1 or Equation 2 to solve for y.
5(-4) + y = -19 (Using Equation 1)
-20 + y = -19
y = -19 + 20
y = 1
Hence , the solution to the system of equations is x = -4 and y = 1
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How to Divide $120in the ratio 3:5
120 ÷ ( 3 + 5 ) = 120 ÷ 8 = 15
15 × 3 = 45
15 × 5 = 75
_________________________________
Answer:
15:75
Step-by-step explanation:
120 = 3x plus 5x
120 = 8x
120/8 = x
x = 15
3*15 = 45 and 5*15 = 75
A 2-column table with 5 rows titled Lou's Shoes. Column 1 is labeled Shoe with entries Sandals, sneakers, running shoes, boots, cleats. Column 2 is labeled Regular price (dollars) with entries x, 10, 12, 14, 16.
Lou’s Shoes is having its annual Flag Day Sale and is offering a 25% discount on all regularly priced shoes. Kayla spends $13.50 buying sandals and sneakers. Determine which equation represents how much Kayla will spend on sandals after the discount.
$13.50 = 0.75(x + 10)
$13.50 – 10 = 0.75x
$13.50 + 10 = 0.75x
$13.50 = 0.25(x + 10)
Answer: it's A
Step-by-step explanation: took the test
POSSIBLE PC
Samantha is buying fertilizer for the grass in her backyard. What is the total area in square feet that she will have to fertilize?
45 ft
22 ft
30 ft
25 ft
2
3
4
Answer:One pound of nitrogen or mixed fertilizer is recommended per 1,000 square feet of lawn and your particular fertilizer contains 20% nitrogen. Refer to Table 1 to convert this to five pounds of fertilizer that should be applied per 1,000 square feet.
Step-by-step explanation:
Which expression means the same as "25 less than 5y"?
A. 5y - 25
B. 25 - 5y
C. 5y - 25
D. 25 = 5y
Answer:
a) 5y - 25
Step-by-step explanation:
please help me with this one
Answer:
248
Step-by-step explanation:
Divide 62 by 2 to get 31. Each distance on the map should be multiplied by this number. So if it's 8 on the map, its 8 x 31 in real life. 8 x 31 = 248
A cylinder has a height of 16 yards. Its base has a radius of 7 yards.
Find its volume, in cubic yards, to the nearest tenth. Use 3.14 or the
calculator value for pi.
Answer:
[tex]\boxed {\boxed {\sf v= 2463.0 \ yd^3}}[/tex]
Step-by-step explanation:
The volume of a cylinder is found using the following formula:
[tex]v= \pi r^2h[/tex]
The height of the cylinder is 16 yards and the radius is 7 yards. Let's use the pi button on a calculator for pi. Substitute these values into the formula.
[tex]v= \pi* (7 \ yd)^2 * 16 \ yd[/tex]
Solve the exponent.
(7 yd)²= 7 yd* 7 yd= 49 yd²[tex]v= \pi * 49 \ yd^2 *16 \ yd[/tex]
Multiply the three numbers together.
[tex]v= \pi *784 \ yd^3\\v=2463.00864041 \ yd ^3[/tex]
Round to the nearest tenth.
[tex]2463.0\underline0864041[/tex]The 0 in the hundredth place tells us to leave the 0 in the tenth place.
[tex]v= 2463.0 \ yd^3[/tex]
The volume of the cylinder is 2463.0 cubic yards.
What is the slope in this situation: A bean plant is growing three inches every two days.
Answer:
I need a picture of the problem to be able to solve it.
Step-by-step explanation:
10. You currently have $40 dollars. You make $7.50 per hour at your part-
time job. If you worked 5 hours on Friday, 6 hours on Saturday, and 4 hours
on Sunday, how much money do you have in total?
Answer:
(B) $152.50
Step-by-step explanation:
Friday: 5 hours x $7.50 per hour = $37.50
Saturday: 6 hours x $7.50 per hour = $45
Sunday: 4 hours x $7.50 per hour = $30
$40 + $37.50 + $45 + $30 = $152.50
I would have (B) $152.50 in total.
Hopefully this helps :3 sorry if wrong :( Plz mark brainiest if correct :D Your bootiful/handsome! Have a great day luv <3
-Bee~
PLS HELP
45°
.
9
V
Solve for x.
09
O 9V2
O 9V3
09
IN
Step-by-step explanation:
Let the remaining angle be z.
45+z=90
z=90-45
z=45
y=9(isoceles triangle)
Then,
By pythagoras theorem,
x=9root2
John wanted to buy his favorite rubber shoes. Its original price is $105. He is lucky today because the shoes that he wanted to buy is 30% off the original price. How much will John pay now for his shoes?
Answer:
The answer is 31.5
Step-by-step explanation:
Discount = Original Price x Discount %/100
Discount = 105 × 30/100
Discount = 105 x 0.3
You save = $31.50
Can some show the steps and the answer please I really need help tell me how you get it and the answer
Answer:
if you use the 10 feet ladder base is 6 feet
if you use 12 feet ladder base is 8.94 feet
if you use 15 feet ladder base is 12.69 feet
Step-by-step explanation:
you know the ladder length so you know the hypotenuse
you can use a^2 + b^2= c^2
for example you use the 10 feet ladder
8^2+b^2 = 10^2
64 + b^2 = 100
subtract 64 from both sides
b^2=36
to get rid of the exponent find square root
b= 6
you can plug in the different values like 15 or 12
The slope is 8 over 3 & the y-intercept is -5 . What is the equation ?
Answer:
[tex]y = \frac{8}{3} x-5[/tex]
Step-by-step explanation:
Classify the polynomial 30x
Answer:
C: monomial
Step-by-step explanation:
You need to classify the polynomial. But before we start, let's recall the basic classifications of polynomials:
Monomials
Binomials
Trinomials
Polynomials
What are monomials?
- expressions with only one term
What are binomials?
- expressions with two terms
What are trinomials?
- expressions with three terms
What are polynomials?
- expressions with four or more terms
30x is an expression with only one term, so it's a monomial.
∴ letter C: monomial
An article is bought for Rs 100 and sold for Rs 125. What
is the profit percentage?
(Ans: 25%
Answer:
25%
Step-by-step explanation:
125 - 100 = 25
25 / 100 = 0.25
0.25 * 100 = 25%
What is the solution to the equation x3 = 16?
The solution of the equation x³ = 16 will be;
⇒ x = 2.519
What is an expression?Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Given that;
The equation is,
⇒ x³ = 16
Now,
Since, The equation is,
⇒ x³ = 16
Solve for x as;
⇒ x = ∛ 16
⇒ x = 2.519
Thus, The solution of the equation is,
⇒ x = 2.519
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find the value of tan30+cot30+sin60
Hello!
This is a problem about relating values of the Unit Circle.
First, we need to figure out the specific "points" of each angle measure of 30 and 60.
For the angle measure 30, the point will be [tex](\frac{\sqrt{3}}{2},\frac{1}{2})[/tex].
For the angle measure 60, the point will be [tex](\frac{1}{2},\frac{\sqrt{3}}{2})[/tex].
The tangent value of a point will be its [tex]y[/tex] value over its [tex]x[/tex] value.
[tex]\frac{\frac{1}{2}}{\frac{\sqrt{3}}{2}}=\frac{1}{2}*\frac{2}{\sqrt{3}}=\frac{1}{\sqrt{3}}=\frac{\sqrt{3}}{3}[/tex]
The cotangent value of a point will be the reciprocal of the tangent value, which we found previously.
[tex]\frac{3}{\sqrt{3}}=\frac{3\sqrt{3}}{3}=\sqrt{3}[/tex]
The sine value of a point will be the [tex]y[/tex] value of the point.
[tex]\frac{\sqrt{3}}{2}[/tex]
So the values we have so far are [tex]\frac{\sqrt{3}}{3}+\sqrt{3}+\frac{\sqrt{3}}{2}[/tex]
Now we have to find the LCD to add these together, which in this case would be 6.
[tex]\frac{2\sqrt{3}}{6}+\frac{6\sqrt{3}}{6}+\frac{3\sqrt{3}}{6}[/tex]
Which adds up to [tex]\frac{11\sqrt{3}}{6}[/tex], which is in simplest radical form.
Hope this helps!
solve for x. does anyone know how to do these so i could do them myself
a guidebook says this tower is 50m tall.Is that correct? given deegrees are 27° and 46°
9514 1404 393
Answer:
yes
Step-by-step explanation:
The tower is about 50.1 meters tall. The guidebook is correct.
__
The distance from the base of the tower to the angle vertex is ...
d1 = h/tan(46°)
d2 = d1 +50 = h/tan(27°)
Then the height of the tower is ...
h/tan(46°) +50 = h/tan(27°)
50 = h(cot(27°) - cot(46°))
h = 50/(cot(27°) -cot(46°)) ≈ 50/(1.96261 -0.96569) ≈ 50/0.99692
h ≈ 50.1544 . . . meters
The tower is more than 50 meters high.
I WILL GIVE BRAINLLEST IF CORRECT PLEASE ITS DUE TODAY
DO NOT SEND ME A LINK FOR THE ANSWER
(giving 15 points)
Answer:
Go on your app store on your phone
Step-by-step explanation:
Download photo math and it will answer all that, check my previous answers if you don't believe me. I'm telling the truth
If it is 78°F in Memphis and -14°F
in Junaeu, what is the temperature
difference between the two cities?
Answer:
There is a 92°F difference between the two cities.
Step-by-step explanation:
Since you are finding the difference of temperatures between the two cities, you need to subtract -14 from 78. It looks like 78-(-14). Since you are subtracting a negative number, the equation becomes 78+14. 78+14 is 92.
Multiply the two binomials.
(3x + 5)(4x - 1)
HELP PLS
Answer:
12x² + 17x - 5
Step-by-step explanation:
Given
(3x + 5)(4x - 1)
Each term in the second factor is multiplied by each term in the first factor, that is
3x(4x - 1) + 5(4x - 1) ← distribute parenthesis
= 12x² - 3x + 20x - 5 ← collect like terms
= 12x² + 17x - 5
A rectangular fish tank is 22 inches tall. The base edge lengths are 20 inches and 18 inches. What is the total surface area of the fish tank?
Answer:
2392in^2
Step-by-step explanation:
Given data
Dimension
Height 22 inches
Lenght= 20inches
Width= 18inches
The expression for the total surface area is
TSA=2(lw + lh + wh)
Substitute
TSA=2(20*18+20*22+18*22)
TSA=2(360+440+396)
TSA=2*1196
TSA=2392 in^2
Hence the total surface area is 2392in^2
Dan bought 35 pieces of candy. He gave 4 pieces to each of his friends. He only has 3 pieces left. Which equation, when solved for
X, gives the number of friends?
Answer:
35 - 4x = 3
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
35−4x=3
35+−4x=3
−4x+35=3
Step 2: Subtract 35 from both sides.
−4x+35−35=3−35
−4x=−32
Step 3: Divide both sides by -4.
-4x/−4 = −32/ −4
x=8
Answer:
8 friends
Step-by-step explanation:
4 doesn't go evenly to 9 ppl so it would be 8 friends and 3 extra pieces