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juin [17]
3 years ago
5

Evaluate the expression a2+6ab for a=−3 and b=4.

Mathematics
1 answer:
inn [45]3 years ago
5 0
First you plug in the variables:

(-3)(2)+(6)(-3)(4)

Multiply:
-6+(-18)(4) 
-6+-72

Add and your answer comes out to be:
-78

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Why does the equation y = 3x + 5 NOT represent a proportional relationship?
Step2247 [10]

Answer:

Step-by-step explanation:

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form  or  

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

In this problem we have

This is the equation of the line in slope intercept form

where

The given equation not represent a proportional relationship, because the line not pass through the origin

In a proportional relationship the value of b (y-intercept) is equal to zero

3 0
3 years ago
Which equations can be used to solve for y, the length of the room? Check all that apply. y(y + 5) = 750 y2 – 5y = 750 750 – y(y
Alex777 [14]
Let's assume length of the room as y
so the width of the room = y - 5

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5 0
3 years ago
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What is your opinion should I join the army or military corp
grin007 [14]

Answer:

military corp

Step-by-step explanation:

6 0
2 years ago
The area of a quarter circle is 19.625 square kilometers. what is the quarter circle's perimeter?
liubo4ka [24]

a quarter of a circle is 19.625

 so the area of full circle is 19.625 x 4 = 78.5 sq. km

area of a circle is PI x r^2

78.5 = 3.14 x r^2

78.5/3.14 = 25 = r^2

r = sqrt(25) = 5

radius is 5 km

circumference ( perimeter) = 2 x PI x r

2 x 3.14 x 5 = 31.4 km

 perimeter is 31.4 km

6 0
3 years ago
Tara saved $90.75 in 3 months. She saved $39.95 in the first month and $1.95 in the second month. How much money did Tara save i
den301095 [7]
To answer this question we need to add 39.95+1.95=41.9
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The answer is 48.85. 

Hope this helps! If it does, please rate, thank, and if it really helped give brainliest! Thanks! :)
5 0
3 years ago
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