Answer:
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Step-by-step explanation:
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The value of b is -6.
Explanation:
The expression is
To determine the value of b, we shall solve the expression.
Applying exponent rule, , we get,
Applying exponent rule, , we have,
The expression is of the form, then
Applying this rule, we get,
Dividing both sides by 4, we have,
Hence, the value of b is -6.
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It should be A.
When you're using exponents, anything that has an exponent of 0 will be 1.
You can use a calculator to confirm on your own.
41 word/min
Before noon Ali works:
She types:
After lunch she works:
Total Ali works= 4+4= 8 hours= 480 min
Total Ali types= 11520+8160= 19680 words
Average typing rate= 19680 words/480 min= 41 word/min
c = - 7
the standard form of a quadratic equation is
ax² + bx + c = 0 : a ≠ 0
x² + 4x - 7 = 0 is in standard form
By comparison of the coefficients of the terms, c = - 7
We use negative values for the money Arleen spends.
a) We determine the change to the value on her gift card:
4(-35)+(-9)= -140+(-9)=-149
b) We determine the amount on money she has left on the gift card after renting the tiller and buying the rake:
200+(-149)=51
Since she has got $51 on her gift card and a wheelbarrow is $50 she is able to buy it:
51>50
RESULT
a) -$149 less b) yes