3 years ago

A variable needs to be eliminated to solve the system of equations below. Choose the correct first step.

Mathematics

1 answer:

Nezavi [6.7K]3 years ago

6 0

reeeeeeeeeeeeeeeeeeeeeeee

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Simplify the radical expression √(5) + 6√(5)

Evgesh-ka [11]

Answer is C) 7√(5)
cause

√(5) + 6√(5)
=√5 (1+6)
= 7√5

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3 years ago

If PQR is a triangle,given that /PQ\=15m, /QR\=17m and /RP\=18m.Find the area of the triangle to the nearest whole number.

nydimaria [60]

Answer:

118.3 m²

Step-by-step explanation:

Step 1. Calculate the semiperimeter (s).

s = (p + q + r)/2

s = (17 + 18+ 15)/2

s = 50/2

s = 25 m

===============

Step 2. Calculate the area (A).

Use Heron’s formula:

$A = \sqrt{s(s-p)(s-q)(s-r)}$

$A = \sqrt{25(25-17)(25-18)(25-15)}$

$A = \sqrt{25\times8\times7\times10}$

$A = \sqrt{14 000}$

$A = 20\sqrt{35}$

A = 118.3 m²

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3 years ago

With direct variation, if you increase the input, the output

sladkih [1.3K]

Increases proportionally. (C)

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3 years ago

Which shows the numbers 1/10,0.9,3/10 in order from least to greatest

jonny [76]

1/10, 3/10, 0.9
Hope this Helps

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3 years ago

Read 2 more answers

3t>5t+12 please help me? i suck at math

Alex777 [14]

3t>5t+12
Subtract 5t from both sides to get the variable on only one side.
-2t>12
Divide both sides by -2
Final Answer: t< -6

3 0

3 years ago