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3 years ago

I need help with number 8 please. if you don't mind can you show your work so I know how to do it? Thanks in advance! :)

Mathematics

1 answer:

Trava [24]3 years ago

7 0

You have to divide both sides by 5 because it states"5t" and you should get "t=20"

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If triangle ABC is similar to triangle PQR, find the value of x and y.

tester [92]

Answer:

x = 9

y = 6

Step-by-step explanation:

ΔABC ~ ΔPQR

Therefore, corresponding sides of these similar triangles will be in the proportional.

$\frac{AB}{PQ}=\frac{BC}{QR}= \frac{AC}{PR}$

$\frac{6}{x}= \frac{4}{y}= \frac{8}{12}$

$\frac{6}{x}= \frac{8}{12}$

x = $\frac{12\times 6}{8}$

x = 9

Similarly, $\frac{4}{y}= \frac{8}{12}$

y = $\frac{12\times 4}{8}$

y = 6

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3 years ago

3x - y = -10<br> -8x - y = 23

Anni [7]

Answer:

(x,y)=(0,-23)

Step-by-step explanation:

5 0

3 years ago

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vlada-n [284]

Volume of the cylinder is 480 cm³ (rounded off to the nearest tenth)

Step-by-step explanation:

Step 1: Find volume of the cylinder when radius = 4 cm and height = 9.5 cm

Volume = πr²h = 3.14 × 4² × 9.5

= 3.14 × 16 × 9.5 = 477.28 cm³ ≈ 480 cm³

3 0

3 years ago

Round 2.12747677748 to the nearest ten-thousandth.

cupoosta [38]

Answer:

Step-by-step explanation:

7 0

3 years ago

Which expression is equivalent to 5^3?

AleksAgata [21]

Answer:

C and D

Step-by-step explanation:

5^3 - 5^0 = 125 - 1 = 124, so it's not A

5^12 / 5^4 = 5^(12-4) = 5^8, so it's not B

5^7 * 5^-4 = 5^(7+(-4)) = 5^3, so it can be C

5^0 * 5^3 = 5^(0+3) = 5^3, so it can be D

5 + 5^2 = 5 + 25 = 30, so it can't be E

3 0

2 years ago