Answer:
the answer is D
Step-by-step explanation:
you multiply the feet, height and wight together i think
At a certain instant the edge of a cube is 7 inches long and the volume is increasing at the rate of 3 cubic inches per minute. How fast is the surface area of the cube increasing
Answer:
The surface area increases at 12/7 square inches per minute
Step-by-step explanation:
Given
[tex]l = 7[/tex] --- side length
[tex]\frac{dV}{dt} = 3in^3/min[/tex] --- Rate at which volume increases
Required
The rate at [tex]which[/tex] the [tex]surface[/tex] area [tex]increases[/tex]
The volume of a cube is:
[tex]V = l^3[/tex]
Differentiate with respect to time
[tex]\frac{dV}{dt} = 3l^2 \cdot \frac{dl}{dt}[/tex]
When [tex]l = 7[/tex] and [tex]\frac{dV}{dt} = 3in^3/min[/tex]
The expression becomes:
[tex]3 = 3 * 7^2 \cdot \frac{dl}{dt}[/tex]
Divide both sides by 3
[tex]1 = 7^2 \cdot \frac{dl}{dt}[/tex]
[tex]1 = 49 \cdot \frac{dl}{dt}[/tex]
Divide both sides by 49
[tex]\frac{dl}{dt} = \frac{1}{49}[/tex]
The surface area is calculated as:
[tex]A= 6l^2[/tex]
Differentiate with respect to time
[tex]\frac{dA}{dt} = 12l\frac{dl}{dt}[/tex]
Substitute: [tex]\frac{dl}{dt} = \frac{1}{49}[/tex] and [tex]l = 7[/tex]
[tex]\frac{dA}{dt} = 12 * 7 *\frac{1}{49}[/tex]
[tex]\frac{dA}{dt} = 12 *\frac{1}{7}[/tex]
[tex]\frac{dA}{dt} = \frac{12}{7}[/tex]
The surface area increases at 12/7 square inches per minute
Kaylee measured her dog and found out that it weighs 20 lbs. a. Last year, the dog weighed 22 lbs. What is the percent of change in the weight of the dog?
A sales item is 20% off. If the final price of the item was $560.00, what was the original price of the item?
Answer:
700
Step-by-step explanation:
price x .80 (100%-20)=560
price=560/.8
price=700
The item's initial cost before taxes is $700.
What is the percentage?A value or ratio that may be stated as a fraction of 100 is referred to as a percentage in mathematics. If we need to compute a percentage of a number, we should divide it by its whole and then multiply it by 100. The proportion, therefore, refers to a component per hundred. Per 100 is what the term percent signifies. The letter "%" stands for it.
Given, A sales item is 20% off. If the final price of the item was $560.00
Let "x" be the original price of the item
Since If the final price of the item was $560.00
Thus,
x(1 - 20%) = 560
x(1- 20/100) = 560
x(80/100) = 560
x = 700
therefore, The original price of the item without tax will be $700.
Learn more about percentages here:
https://brainly.com/question/29306119
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Here is a sequence of numbers:
1
1
2
3
5 8
a)
C
What kind of sequence is this?
13
b)
Find the next number in the sequence.
13
Answer:
This is the Fibonacci Sequence. The next number is found by adding up the two numbers before it. Therefore the next number is (13+8) 21.
Step-by-step explanation:
James went out for. a long walk . he walked 3/4 mile and then sat down to take rest. then walked 1/8 of a mile how far did he walk altogether
change 3/4 to 6/8 and add 6/8 and 1/8 to get 7/8
he walked 7/8 miles in total :)
what is the slope to y=-3x+5
Answer:
slope = -3
Step-by-step explanation:
the slope is -3. This is because the equation of slope intercept form is y=mx+b, with m, being the slope. Thus, the slope of in the equation y=-3x+5 is -3.
If you feel like it, would like if you can give brainliest :)
There are 7 red, 9 blue, 2 yellow and 4 green marbles in a bag. You make 2 draws from the bag without returning the first marble selected back to the bag. What is the possibility you select a red then green marble at random?
Answer:
11 out of 22 marbles
Step-by-step explanation:
Just add up the red and green marbles to get the top # and then add up all the colored marbles to get the bottom #.
Hope this helps :) Please give brainliest!
whice set of side will make a triangle
First things first.. What type of triangle
If u are taking about a normal triangle here is some:
∠60+∠60+∠60
∠30+∠90+∠60
∠11+∠82+∠87
PLEASE HELP, PLEASE....
Answer:
allen= y=3/2+2 billy= y= 3/2+4
Step-by-step explanation:
ok both of the equation are (almost) the same except for the y intercepts.
y=mx+b... you are learning about that hopefully!
so. each of their trees are growing by 3... feet I'll just say feet. that means the slope is three because they are each going up that much. you also have to pay attention to the fact that the year is going up by two, so your tree is actually growing by 1.5 (3 halves) feet each year. now you have to find the y intercept by back tracking. remember that the y intercept is where y is zero and x is whatever it is.
if you go back three on allen, the y intercept is 2 and if you go back on billy, the y intercept is 4.
as for the second question, the lines are parallel. they have the exact same slope so that means that they will never cross because billy's line is higher then allens, billy's tree will always be higher
Find Surface Area from triangle rectangle :
Answer:
here is the answer, I had sent a photo. Do you see it.
Your commission is $60 for
every $200 sold.
Commission on $700 =
a=260
b=140
c=210
Answer:Its 210
Step-by-step explanation:
Trust me
Find the volume of the cylinder
Answer:
[tex]14130 {ft}^{3} [/tex]
Approximately 70% of high school graduates attend college. If Smith Town has a graduating class of 300 students, how many can be expected to attend college?
Answer:
210
Step-by-step explanation:
Multiply by the total amount by the decimal equivalent of 70% (0.7) to get your answer.
25 - 6r = 25 please i really need to know what R is
Answer:
r = 0
1.
25-6r=25
−6r+25=25
2.
− 6r+25 = 25
− 6
Will give brainliest to whoever can answer with evidence to support your answer.
Answer:
12x - 10 = 14.5x - 20
Step-by-step explanation:
Store A = $12 each and subtract 10
Store B = $14.5 each and subtract 20
Equation:
12x - 10 = 14.5x - 20
If my answer is incorrect, pls correct me!
If you like my answer and explanation, mark me as brainliest!
-Chetan K
Which number line shows 1 5/16
Answer:
B.
Step-by-step explanation:
[tex]1\frac{5}{6}[/tex] when converted to a decimal is 1.3125, and as you see B. is the closest to 1.3125.
In a 3-digit number, the humdrends digit is one more than the ones digit and the tens digit is twice the hunderends digit. If the sum of the digits. Is. 11, find the number
Answer:
362
Step-by-step explanation:
let the digits that make up the number be a, b and c with a in the hundred position, b in the tens and c in the units position. Given that
he hundreds digit is one more than the ones digit
a = c + 1
c = a - 1
and the tens digit is twice the hundreds digit
b = 2a
If the sum of the digits is 11
a + b + c = 11
substituting
a + 2a + a - 1 = 11
4a - 1 = 11
4a = 11 + 1
4a = 12
a = 12/4
= 3
recall that
c = a - 1 = 3 - 1 = 2
b = 2a = 2 * 3 = 6
Hence the number is 362
answer this question for brainilest and points
Answer:
g= 1
Step-by-step explanation:
-3+5+6g=11-3g
-3+5=11-9g
-3-11+5=-9g
-9=-9g
1=g
you want to first isolate the variables on one side. from there you calculate all the real numbers together. then you divide the number being multiplied with teh variable by the number that was calculated on the other side.
Once you have a singluar amount of the variable, you know you have your answer.
Find the distance between each pair of points. Round to the nearest hundredth (-8,-2) and (6,-1)
Answer:
Use the distance formula to determine the distance between two points.
Exact Form:
√
197
Decimal Form:
14.03566884
…
Step-by-step explanation:
bill plays a game of a chance at school fair.
he spins these 2 spinners.
if the sum of his number is an even number, he will win a prize.
complete this addition chart to show the possible totals
Answer:
well... this normal addition
Step-by-step explanation:
9+8=17
9+1=10
5+4=9
5+2=7
3+4=7
3+1=4
^^ please help!! i will give brainilest .
f(x) = 4x2 + 5x - 3
g(x) = 4x2 – 3x2 + 5
Find (f +g)(x).
Answer:
5x + 12
Step-by-step explanation:
simplify f(x) and g(x)
g(x) = 4*2 -3*2 +5
g(x) = 8 -6 + 5
g(x) = 7
and
f(x) = 4*2 + 5x -3
f(x) = 8 + 5x - 3
f(x) = 5x + 5
So (f + g)(x) = f(x) + g(x)
(f + g)(x) = (5x + 5) + (7)
(f + g)(x) = 5x + 12
SELECT ALL THAT APPLY: If the angles of
a triangle are 42°, 73°, and 65°, which of the
following would be exterior angles of the
triangle? *
Answer:
Step-by-step explanation:
The 3 exterior angles are 180-42, 180-73 and 180-65
= 138, 107 and 115 degrees.
i need help on all of these my parents are working the night shift plz
Answer:
1. 62
2. 13
3. 6
4. 44
5. 3
6. 14
7. Step 1
8. Step 3
Step-by-step explanation:
Work for #1
32÷4×8-2
8×8-2
64-2
62
Work for #2
20÷2+3
10+3
13
Work for #3
[tex]\frac{1}{2}[/tex] ×24÷3+2
12÷3+2
4+2
6
Work for #4
2×(3+8)-4
2×24-4
48-4
44
Work for #5
(4+6÷3)×[tex]\frac{1}{2}[/tex]
(4+2)×[tex]\frac{1}{2}[/tex]
6×[tex]\frac{1}{2}[/tex]
3
Work for #6
21÷3+(8-1)
21÷3+7
7+7
14
Explanation for #7
Step 1
This is because in PEMDAS, you do multiplication before subtraction. In the first step, they did subtraction before multiplication.
Explanation for #8
Step 3
This is because in PEMDAS, you do multiplication before subtraction. In the first step, they did subtraction before multiplication.
Hope this helps!
Jake throws a stone off a bridge into the river. The stones height in meters above the water is based on the time in seconds after jake threw the stone. The quadratic equation y=-5^2+10x+15 represents the scenario
Answer:
The stone will hit the water after 3 seconds
Step-by-step explanation:
Given
[tex]y = -5x^2 + 10x +15[/tex]
Required
At what time will the stone enter the water
When the stone enters the water;
[tex]y = 0[/tex]
So, we have:
[tex]-5x^2 + 10x +15 = 0[/tex]
Divide through by -5
[tex]x^2 -2x -3 = 0[/tex]
Expand
[tex]x^2 +x -3x -3 = 0[/tex]
Factorize
[tex]x(x +1) -3(x +1) = 0[/tex]
Factor out x + 1
[tex](x -3) (x +1) = 0[/tex]
Solve for x
[tex]x - 3 = 0\ or\ x + 1 = 0[/tex]
[tex]x = 3\ or\ x = -1[/tex]
x (time) cannot be negative.
So:
[tex]x = 3[/tex]
What is the area of a triangle shape with a base of 12 feet, sides that are 7 feet, and a height of 9 feet
Answer: The Answer Is 54 ft2
Answer:
54
Step-by-step explanation:
A=1/2(b)(h)
Write equation for the center(-1,0) radius of 6
Answer:
(x+1)² + y² = 36
Step-by-step explanation:
Equation of a circle:
(x-h)² + (y-k)² = r²
Center: (h,k)
Radius: r
Given a center of (-1,0) and a radius of 6, we have for our equation:
(x-(-1))² + (y-0)² = 6²
(x+1)² + y² = 36
Which number is equal to 5 x 103?
A. 150
B. 500
C. 515
D. 5.000
Answer:
515
Step-by-step explanation:
5x 103 = C. 515
Find the height of a cylinder when the surface area is 1004.80 cm squared and the radius is 10 cm.
Step-by-step explanation:
[tex]volume =\pi {r}^{2}h[/tex]
[tex]area = \pi {r}^{2} [/tex]
CALCULATIONremember
[tex]\pi = 22 \div 7[/tex]
So, we will just place the area and equate it to the unknown volume including the height
1004.80 = 22/7 × 10× 10 × h
1004.80 = 314.26h
h = 3.197
The area of a right triangle is 54 square centimeters. The lengths of the sides of the triangle are each multiplied by 4. What is the area of the new triangle?
A).4cm²
B).216cm²
C).864cm²
D).2916cm²
Answer:
864
Step-by-step explanation:
Answer:C 864cm
Step-by-step explanation: