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3 years ago

9

2b for b = 9 evaluate the expression

2 answers:

solong [7]3 years ago

5 0

Answer:

18

Step-by-step explanation:

Since it is evaluating, all you have to do is replace the b's that you see with 9s

2b for b=9

2(9)

18

Allisa [31]3 years ago

3 0

your answer is: 2(9) = 18

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Mother gives birth to a 8 pound baby. Every 4 months, the baby gains 3 pounds.

Slav-nsk [51]

Hello!

The equation, y = mx + b is slope-intercept form. In this equation, m is the slope, and b is the y-intercept.

If the baby was exactly 8 pounds when it was born, then the y-intercept is (0, 8) because at zero months, the baby was eight pounds. To find the rate of change, we can use the the y-intercept (0, 8), and the weight of the baby at four months, which is (4, 8 + 3) → (4, 11).

Since we have two points, we can use the slope formula $(\frac{y_{2}-y_{1}}{x_{2}-x_{1}})$ to find the rate of change.

$\frac{8 -11}{0-4} = \frac{-3}{-4} = \frac{3}{4}$ .

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Therefore, the equation that describes the baby's weight is y = 3/4x + 8.

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3 years ago

Which of the relations given by the following sets of ordered pairs is a function?

Readme [11.4K]

Answer:

d.{(8,1),(−4,1),(3,5),(0,4),(−1,2)} - function

Step-by-step explanation:

a.{(2,4),(2,6),(2,8),(2,10),(2,12)}

Each value of x goes to more than one value of y- this is not a function

b. {(−5,−4),(−4,−3),(−3,−2),(−4,−5),(−2,−1)}

The value of x at -4 goes to more than one value of y- this is not a function

c.{(0,3),(−6,8),(−3,5),(0,−3),(7,11)}

The value of x at 0 goes to more than one value of y- this is not a function

d.{(8,1),(−4,1),(3,5),(0,4),(−1,2)}

Each value of x goes to only one value of y- this is a function

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3 years ago

If a = − 65 and b = 8, the product of a x b models which rule for multiplying integers? What is the product?

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A = -65
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when multiplying, if the signs are different, then the product is negative

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3 years ago

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This could be an answer

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The answer is 1 or 2.

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