Simplify by factoring.
A. 147x
B. 7x
C. 7
D. 3x2
Answer: B
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Multiply.-10b8(7b5 - 7b4 + 3)
A. -70b13 + 70b12 - 30b8 B. -70b5 + 70b4 - 30 C. -70b13 - 7b4 + 3 D. -70b13 + 70b12 + 3
Add or subtract as indicated. Simplify, if necessary.
- 
A. 
B. 
C. 8z - 9
D. 
Estimate by rounding as indicated.There are 27,878,400 square feet in one square mile. How many square feet are there in 33 square miles? Estimate by rounding the number of square feet in one square mile to the nearest ten million and the number of square miles to the nearest ten. Also find the exact answer.
A. Estimate: 900,000,000 sq ft; exact: 919,974,000 sq ft B. Estimate: 840,000,000 sq ft; exact: 919,974,000 sq ft C. Estimate: 900,000,000 sq ft; exact: 919,987,200 sq ft D. Estimate: 840,000,000 sq ft; exact: 919,987,200 sq ft
Translate the sentence into an equation, then solve.A number x increased by 
is equal to 7.
A. x + 
= 7, x = 7
B. x + 7 = 
, x = - 6
C. x + 
= 7, x = 6
D. 
+ x = 7, x = 2