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Sergio039 [100]
3 years ago
8

13 R S 12 What's the length of QR? A) 1 B) 17.7 C) 6.7 OD) 5

Mathematics
1 answer:
ANEK [815]3 years ago
8 0

Answer:

5

Step-by-step explanation:

This is a right triangle, so we can use the Pythagorean theorem

a^2+b^2 = c^2

where a and b are the legs and c is the hypotenuse

QR^2 + 12^2 = 13^2

QR^2 +144 =169

QR^2 = 169-144

QR^2 =25

Take the square root of each side

QR = sqrt(25)

QR =5

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3 years ago
Angelica's salary this year is 14% higher than it was four years ago. If she earns $46,170.00 this year, what did she earn four
Alona [7]

Answer:

D. $39,706.20

Step-by-step explanation:

In this problem, you are subtracting 14%. A way you could do this is buy finding 14% of $46,170.00, then subtracting that from itself. Or instead, you could find 86%. This works because its like your subtracting 14% from the whole 100%. so 100 - 14 = 86.

Method 1:

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Method 2:

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either way the answer is still correct. i hope this make sense and that it helps you!

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2 years ago
Which expression is equivalent to 6m + (m – 2)(m + 7) + 3?
LuckyWell [14K]

Hello from MrBillDoesMath!

Answer:

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Discussion:

6m +  (m-2)(m+7) +3 =

6m  + (m^2 + 7m - 2m -14) + 3 =

(6m + 7m - 2m) + m^2 + (-14 + 3) =             combine similar terms

11m + m^2 -11 =

m^2 + 11m - 11


which is the first choice


Thank you,

MrB

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Step-by-step explanation:


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