Answer:
2πr
2(22/7)(3.5)
22
Step-by-step explanation:
help plz need help will make mi day if u help
Answer:
2 1/4 i believe correct me if im wrong
Step-by-step explanation:
whats 1/2 x 1/4? im unbanned
Step-by-step explanation:
Given
[tex] = \frac{1}{2} \times \frac{1}{4} \\ = \frac{1}{8} [/tex]
Hope it helps :)❤
Tell whether -3 is a solution of the inequality
3-4r >_ 15
Answer:
-3 is a solution.
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of EqualityStep-by-step explanation:
Step 1: Define
3 - 4r ≥ 15
Step 2: Solve for r
[Subtraction Property of Equality] Subtract 3 on both sides: -4r ≥ 12[Division Property of Equality] Divide -4 on both sides: r ≤ -3Step 3: Compare
Substitute in r: -3 ≤ -3This is true. -3 is less than or equal to -3.
Given the matrix:
a= 2 5
4 -8
The sum of the elements in row 1 is:
The sum of the elements in column 2 is:
Answer:
The answer is as follows
1) 7
2) 3
3) 4
Answer:
7
-3
4
Step-by-step explanation:
The three sides of AXYZ
measure 13 feet, 17 feet, and
21 feet. IS AXYZ an acute,
right, or obtuse triangle?
9514 1404 393
Answer:
acute
Step-by-step explanation:
I like to think of this in terms of the "form factor" (a term I made up). It is computed as ...
f = a² +b² -c²
where a, b, c are the side lengths, and c is the longest.
The interpretation is ...
f > 0 . . . acute
f = 0 . . . right
f < 0 . . . obtuse
Here, we have ...
f = 13² +17² -21² = 17 . . . . . the triangle is acute
_____
Additional comment
The measure of the largest angle is ...
arccos(f/(2ab)) = (17/(2(13·17)) = arccos(1/26) ≈ 87.8°
You can see that (2ab) is always positive, so the sign of f matches the sign of the cosine of the angle. That is what leads to the above interpretation.
This formula comes from the Law of Cosines, of which the Pythagorean theorem is a special case.
evaluate the question
Answer:
A) 5/6
B) -67/30 (or) -2 7/30
A) -9/2 (or) -4 1/2
Step-by-step explanation:
A) 2/3(5)-5/2=3 1/3-5/2 = 10/3-5/2 = 20/6-15/6= 5/6
B) 2/3(2/5)-5/2= 4/15-5/2 = 8/30-75/30 = -67/30
A) 2/3(-3)-5/2=-2-5/2= -4 1/2
how many different 4-digit security codes are possible if all of the digits must be odd?
A couch and coffee table cost a total of $1017 . The cost of the couch is two times the cost of the coffee table. Find the cost of each item.
Answer:
The couch costs $678 and $339 for the coffee.
Step-by-step explanation:
In total you spent $1017 and it was used in 3 portions, 2 for the couch, and 1 for the coffee. First divide it and find out how much each portion costs. In this case (1017 divided by 3) the answer will be 339. Now since you spent 2 of the 3 portions on the couch multiply one portion by 2. Then you get 678 for 2 portions, hence telling us that the couch costed, $678. With the remaining one portion of 339, you already know coffee costs $339. Please give me brainliest, I am new to answering questions. Thanks!
Please I need help :(
the clock was exactly on time at 7am at 1pm the clock was 228 seconds late at that rate how slow was the clock half an hour
Answer:
19 seconds.
Step-by-step explanation:
Given that the clock was exactly on time at 7am, and at 1pm the clock was 228 seconds late, to determine, at that rate, how slow was the clock half an hour, the following calculation must be performed:
1 PM = 13:00
13 - 7 = 6
228/6 = 38
38/2 = 19
Thus, every half hour the clock is delayed 19 seconds.
The seventh-grade class is building target areas for a PE activity. The bases for the game will be in a circular shape. The diameter of each circle is 6 feet. Approximately how many square
feet of the turf need to be painted for a base circle? Use 3.14 for it and round your answer to the nearest tenth.
O 7.5 square feet
O 9.4 square feet
O 18.9 square feet
O 28.3 square feet
Answer:
28.3
Step-by-step explanation:
pi r^2 = area of circle
6/2 = radius
3.14(3)^2
28.26 -> 28.3
Which is the biggest negative integer
Answer:
-1
Step-by-step explanation:
in numeracy numbers on right hand are bigger than numbers on left hand -1 is bigger than all negative integers. they all fall on the left of -1
A dolphin jumps out of the water. The function h=-16t^2+26t models the height (in feet) of the dolphin after t seconds. After how many seconds is the dolphin at a height of 5 feet.
Answer:
The dolphin is five feet in the air after about 0.22 and 1.40 seconds.
Step-by-step explanation:
The height h (in feet) of the dolphin as it jumped out of the water after t seconds is given by the function:
[tex]h(t)=-16t^2+26t[/tex]
We want to determine the time(s) when the dolphin is five feet in the air.
Since the dolphin is five feet in the air, h(t) = 5:
[tex]5=-16t^2+26t[/tex]
Solve for t. Rearrange:
[tex]16t^2-26t+5=0[/tex]
We can use the quadratic formula, given by:
[tex]\displaystyle t=\frac{-b\pm\sqrt{b^2-4ac}}{2a}[/tex]
In this case, a = 16, b = -26, and c = 5.
Substitute:
[tex]\displaystyle t=\frac{-(-26)\pm\sqrt{(-26)^2-4(16)(5)}}{2(16)}[/tex]
Evaluate:
[tex]\displaystyle t=\frac{26\pm\sqrt{356}}{32}[/tex]
Simplify the square root:
[tex]\sqrt{356}=\sqrt{2\cdot 2\cdot 89}=2\sqrt{89}[/tex]
Hence:
[tex]\displaystyle t=\frac{26\pm2\sqrt{89}}{32}[/tex]
Simplify:
[tex]\displaystyle t=\frac{13\pm\sqrt{89}}{16}[/tex]
Hence, our solutions are:
[tex]\displaystyle t=\frac{13-\sqrt{89}}{16}\approx 0.22\text{ and } t=\frac{13+\sqrt{89}}{16}\approx1.40[/tex]
The dolphin is five feet in the air after about 0.22 and 1.40 seconds.
Whiteout graphing,determine whether the system of linear equations has one solution,infinitely many solutions,or no solution. Explain your reasoning.
Answer:
Are we suppose to answer the equation to? ( reply and i will put the answers in the comment )
Step-by-step explanation:
Which is the graph of f(x)= 3/2(1/3)^x ?
Answer:
HERE IS THE ANSWER HOPE IT HELPS :)
Step-by-step explanation:
Brainliest PLLLLSSSSS?
Answer:
Answer is B on e 2020
Step-by-step explanation:
Solve the problem.
A person is watching a boat from the top of a lighthouse. The angle of depression from the person to the boat is
28° . The lighthouse is 200 feet tall. How far away is the boat? Round to the nearest foot.
Tan 28= 200/x
x=200/ tan 28
x=376.14
x=376
Step-by-step explanation:
Hope this helps!
The boat is x=376 foot away from the light house.
A person is watching a boat from the top of a lighthouse. The angle of depression from the person to the boat is 28°. The lighthouse is 200 feet tall.
Trigonometry is defined as the study of angles.
Let the boat is x distance away from the lighthouse
assume a right-angle triangle ABC with AB =perpendicular=200, BC = base=X, Angle CAB = 28°(angle of depression means the angle from the boat to the top of lighthouse is also 28°)
tan28 = 200/X
X = 200/tan28
X = 376 foots
Thus, The boat is x=376 foot away from the lighthouse.
Learn more about trigonometry here:
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The vertices of a shaded square are the midpoints of the sides of square ABCD. The length of the diagonal of square ABCD is 6 inches.
Answer:
A=13.47 in.
P=14.68 in.
Step-by-step explanation:
First, we have to figure out the sides of square ABCD. The diagonal forms the hypotenuse of a right equilateral triangle.
a²+a²=6²
2a²=36
a²=18
a=√18
a=4.24
Half of 4.24 would be the distance From each corner of ABCD to the neighboring midpoints. (2.12)
2.12²+2.12²=c²
4.49+4.49=c²
13.48=c²
√13.48=c
3.67=c
Now that we know each side of the shaded square, we can get the area and perimeter.
A=3.67x3.67=13.47
P=3.67x4=14.68
HELP PLEASE PLEASE DUE TONIGHT !! Scores on the Wechsler Adult intelligence Scale (a Standard IQ test) for certain age group are
normally distributed with mean = 100 and standard deviation o = 15. (Find the Z scorels for
each question first, and then use Table A-2 at the back of your book to find the following
probabilities)
a What percent of IQ scores are less than 122?
(4 points)
b What is the probability that a randomly selected adult in this age group has an IQ
score higher than 147? Is this a significant/unusual event? Explain? (5
points)
C
What percent of adults in this age group have IQs between 85 and 100? Is this
I significant/unusual event? Explain?
(5
points)
Tch
3
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Solve the inequality 11r – 177 – 2r > -(r = 233).
Answer with an inequality statement like r<0 or r> 29.
Answer:
11×(233)-177-2(233)-233
Which of the following equations have exactly one solution?
Choose all answers that apply:
-5x + 12 = 52 + 12
-5x + 12 = 5x - 5
--5x + 12 = -52 - 12
-5x + 12 = -122 - 12
Answer:
-5x+12=52+12
Step-by-step explanation:
Hard to explain
Factorise the following expressions :
Answer:
(x+y)²-4xy
x²+2xy+y²-4xy
x²+2xy-4xy+y²
x²-2xy+y²
(x-y)²
or
(x-y)(x-y)
PLEASE HELPP I WILL NASWER ALL QUESTIONS BACK PLS HELP÷
Write the following number sentences as division IN A NEW WAY!!
k divided by the quantity c minus 10 *
The sum of the quantity d and 5 divided by 2
Evan is going to invest $2,800 and leave it in an account for 12 years. Assuming the
interest is compounded annually, what interest rate, to the nearest hundredth of a
percent, would be required in order for Evan to end up with $5,000?
Answer:
5000=2000/1 hshshsjsnndjskbdjs
Answer:
r = 4.95046%
r ≈ 4.95%
A number increased by 8 is equal to twice the same number increased by 7
Answer:
-6
Step-by-step explanation:
According to question,
x + 8 = 2(x + 7)
x + 8 = 2x + 14
2x - x = 8 - 14
x = -6
A number is increased by 8 which is equal to twice of the same number increase by 7 then the number will be -6.
What is an expression?Mathematical actions are called expressions if they have at least two terms that are related by an operator and include either numbers, variables, or both. Adding, subtraction, multiplying, and division are all reflection coefficient operations.
A mathematical operation such as reduction, addition, multiplication, or division is used to integrate terms into an expression.
As per the statement given in the question,
Let the number is x.
Number is increased by 8,
x + 8
Also,
Equal to twice of same number increased by 7.
Then the expression will be,
x + 8 = 2(x + 7)
x + 8 = 2x + 14
x = -6
To know more about expression:
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What is the volume of this composite solid?
16 m
5 m
12 m
9 m
Answer:
864 cubic meters
Step-by-step explanation:
Rectangular prism = 5x9x12=540
Triangular prism = 1/2(9)(6)(12)=324
540+324=864 cubic meters
Someone please help me answer this!!
Answer:
1.75 x 10^5
Step-by-step explanation:
Answer:
[tex]1.75 \times {10}^{ - 5} [/tex]
HELP PLEASEEEEEEE!!!!!!
Answer: I think it is
x y
1 2
3 14
10 56
Step-by-step explanation:
So what I did is you take the 6 and multiply it by the x number then you subtract by 4
Steven has a small business that provides computer application training and data entry support services. He earns $25 per hour for training and $15 per hour for data entry support. Steven can work no more than 40 hours a week. He wants to use linear programming techniques to optimize his income. Part A Construct a model to represent the amount of time Steven can spend on data entry and training. Be sure to define your variables.
Sketch a graph of your model.
Answer:
25×40=100
15×40=30
100+30=130
please help!
Evaluate the expression: [3^2 x (2.4 ÷ 4)] + 1.7
Answer:
7.1
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightStep-by-step explanation:
Step 1: Define
[3² × (2.4 ÷ 4)] + 1.7
Step 2: Evaluate
[Brackets] Exponents: [9 × (2.4 ÷ 4)] + 1.7[Brackets] (Parenthesis) Division: [9 × 0.6] + 1.7[Brackets] Multiplication: 5.4 + 1.7Add: 7.1mimi has 16 more bouncy balls than leah.
Leah had b bouncy balls.
choose the expression that shows how many bouncy balls mimi has.