Use the order of operations to determine which expression matches the phrase "add 3 and 5, then multiply 7"? *

Mathematics

2 answers:

lapo4ka [179]2 years ago

6 0

Answer:

7 x (3 + 5)

Step-by-step explanation:

The 3 and 5 are added together in the parenthesis, and then the 8 we get from that is multiplied by the 7. In order of operations questions, whatever is in the parenthesis is solved first.

stira [4]2 years ago

3 0

Answer: 7 x (3+5)

Explanation: So basically it’s saying to “add 3 and 5” together, which is why they are in parentheses. THEN multiply 7 which implies that afterwards you multiply it by 7.

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valentinak56 [21]

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Step-by-step explanation:

Invert and multiply the way you would any fraction division problem. Then cancel common factors from numerator and denominator.

$\displaystyle\frac{\left(\frac{4x^2+2x}{x^2+x-2}\right)}{\left(\frac{8x^2+4x}{3x^2+10x+8}\right)}=\frac{4x^2+2x}{x^2+x-2}\cdot\frac{3x^2+10x+8}{8x^2+4x}\\\\=\frac{2x(2x+1)(3x+4)(x+2)}{4x(2x+1)(x-1)(x+2)}=\frac{3x+4}{2(x-1)}\\\\=\frac{3x+4}{2x-2}$