Answer:
a = 2, b = - 5
Step-by-step explanation:
Given
y = ax² + bx
is the measure of the slope at x = a
Differentiate each term with respect to x using the power rule
(a
) = na
= 2ax + b, hence
2ax + b = 3 at (2, - 2)
Substitute x = 2 into
4a + b = 3 → (1) and substitute x = 2 into y
4a + 2b = - 2 → (2)
Subtract ( 1) from (2)
b = - 2 - 3 = - 5
Substitute b = - 5 into (1)
4a - 5 = 3 ( add 5 to both sides )
4a = 8 ( divide both sides by 4 )
a = 2
Compatible numbers are numbers that are close in value to the actual numbers and easy to add, subtract, multiply, or divide mentally. They are useful in estimating the sum, difference, product, or quotient.
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Hello!
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❖ Jeff will earn $267.20 in a 32 hour week.
Divide to find how much he gets paid per hour:
$334 ÷ 40 = $8.35
Multiply the cost per hour by 32 hrs to get the total amount he'll get paid:
$8.35 × 32 = $267.20
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Answer:
if the answer is the value of x then it would be 13.5
Step-by-step explanation:
B.
You are looking for something that does not let 25x go over 80.
