mikewwe13:

Devonte is purchasing a blocked shaped like a right rectangular prism for a construction project. He knows the volume, V, and the area of the base, B, of the block. Devonte needs to be sure that the block is not too tall for his project. He wants to rearrange the formula V = Bh so that the height, h, of the block can be determined given the volume and the area of the base. Which equation should Devonte use ? A. h = B/V B. h = V/B C. h = V x B D. h = V - B

8 months ago
Vocaloid:

hint: take V = Bh and divide both sides by B

8 months ago
mikewwe13:

1

8 months ago
Vocaloid:

to divide by B, write a division sign, then write B.

8 months ago
Vocaloid:

for example, to divide V by B, write V, then write a division sign, then write B.

8 months ago
Vocaloid:

V divided by B = V/B now do the same thing with Bh

8 months ago
mikewwe13:

H divided by B = BH

8 months ago
Vocaloid:

divide Bh by B

8 months ago
Vocaloid:

Write down Bh write a division sign then write B then solve

8 months ago
mikewwe13:

Bh ÷ B = Bh

8 months ago
Vocaloid:

hint: B/B = 1 so we can cancel out Bh/B to get h

8 months ago
Vocaloid:

so h = V/b is your answer (answer choice B)

8 months ago
mikewwe13:

The mapping shows the relationship between the variables x and y of function f, where the domain is set x and the range is set y. Which equations are true? Select the two correct equations. A. f(-3) = 21 B. f(9. 4) = 5 C. f(2) · 8 = 16 D. f(0) - 5 = 16 E. f(6.8) - 6.8 = 0

8 months ago
Vocaloid:

is there a picture that goes with this?

8 months ago
mikewwe13:
8 months ago

Vocaloid:

hint: when x = -3, what does f(x) = ?

8 months ago
mikewwe13:

-3

8 months ago
Vocaloid:

the arrow tells you what f(x) equals to look at the arrow at x = -3 where is it pointing? what number?

8 months ago
mikewwe13:

21

8 months ago
Vocaloid:

good, so f(-3) = 21 making A true (we still need to keep going)

8 months ago
Vocaloid:

B. f(9. 4) = 5 this implies that x = 9.4 and f(x) = 5 (this is not true because there is no x value 9.4) let's keep going

8 months ago
Vocaloid:

look at the pic again what is f(2)?

8 months ago
mikewwe13:

f(2)

8 months ago
Vocaloid:

f(2) means the y-value when x = 2 look at the pic what is the arrow at x = 2 pointing at?

8 months ago
mikewwe13:

16

8 months ago
Vocaloid:

good, this means f(2) = 16 C states that f(2) * 8 = 16 which is clearly not true since 16*8 is not 16 so let's keep moving

8 months ago
Vocaloid:

D. f(0) - 5 = 16 using the same logic from before, what is f(0)? answer this by looking at the pic, where x = 0, to find the matching f(x) value

8 months ago
mikewwe13:

x = 0

8 months ago
Vocaloid:

ok, but what is f(0)? see where the arrow is pointing?

8 months ago
mikewwe13:

the answer is 0

8 months ago
Vocaloid:

look at the arrow where x = 0. where is it pointing?

8 months ago
mikewwe13:

21

8 months ago
Vocaloid:

good so f(0) = 21 making f(0) - 5 = 21 - 5 = 16 (true!) so our answers are A & D

8 months ago
Vocaloid:

can we open a new question please

8 months ago