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3 years ago

What expression is equivelent to 8-5(3x-7)

Mathematics

1 answer:

steposvetlana [31]3 years ago

8 0

8 - 5(3x - 7)

8 - (5.3x - 5.7)

8 - (15x - 35)

8 - 15x + 35

43 - 15x

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1. What is the circumference of a circle with a radius of 3? (1 point)

4vir4ik [10]

1. $6 \pi$
This is because
$c= \pi d \\ 
c= 6 \pi$

2. $9 \pi$
because
$A= \pi r^{2} \\ 
A = \pi (3)^{2} \\ 
A = 9 \pi$

3. $4 \pi$
$C= \pi d \\ 
C= 4 \pi$

4. $4 \pi$
$A = \pi r^{2} \\ A = \pi (2)^{2} \\ A = 4 \pi$

Can't really answer the last 2 w/o the figures

7 0

4 years ago

Solve for x please: x-2=17

Lubov Fominskaja [6]

X-2=17
add two to both sides to cancel out the 2
x=19

7 0

3 years ago

Read 2 more answers

What is the measure of c? A. 20 B. 14 C. 16 D. 22

Harman [31]

Answer:

Step-by-step explanation:

The measurements of the segments fall on similar triangles. This means the lengths of each segment can be found using proportions.

Remember, a proportion is an equation which sets equal ratios equal to each other.

$\frac{c}{k}=\frac{a}{j}\\\\\frac{c}{32}= \frac{15}{24}$

To solve for c, multiply numerators and denominators across the equal sign:

24c = 32(15)

24c = 480

c = 20

5 0

3 years ago

VGravel is being dumped from a conveyor belt at a rate of 50 ft3/min. It forms a pile in the shape of a right circular cone whos

kupik [55]

Answer:

0.325 ft/min

Step-by-step explanation:

To solve we must follow the following steps:

First, the volume of a cone is given by the equation:

Vc = (1/3) * Pi * (r ^ 2) * h

where r is the radius and h is the height.

they tell us that the height is equal to twice the radius, therefore

h = 2r; r = h / 2

replacing r in the volume of the cone:

Vc = (1/3) * Pi * ((h / 2) ^ 2) * h

solving we have:

Vc = (1/3) * Pi * (1/4) * (h ^ 2) * h

Vc = (1/12) * Pi * h ^ 3

They give us the change in volume with respect to time, that is, dV / dt = 50

It can also be expressed in the following way:

dV / dt = (dV / dh) * (dh / dt)

We know V, so we can derive with respect to h, we are like this:

dV / dh = 3 * (1/12) * Pi * h ^ 2

dV / dh = (1/4) * Pi * h ^ 2

we know that h is equal to 14, therefore:

dV / dh = (1/4) * Pi * 14 ^ 2

dV / dh = (1/4) * 3.14 * 196 = 153.86

Now if we replace

dV / dt = (dV / dh) * (dh / dt)

50 = 153.86 * (dh / dt)

(dh / dt) = 50/158.36

(dh / dt) = 0.3249

This means that the change in height with respect to time is 0.325 feet per minutes.

4 0

3 years ago

Read 2 more answers

What does it mean for statements to be logically equivalent?

nlexa [21]

Answer:

Two statement forms are called logically equivalent if they have identical truth values for each possible substitution for their statement variables.

Step-by-step explanation:

hope this helps <333

brainliest plz :) ?

8 0

3 years ago