3 years ago

Simplify the rational expressions. state any excluded values

Mathematics

1 answer:

dlinn [17]3 years ago

4 0

Answer:

8.) 3

9.) x+5

10.) 50x/2x-5

11. 3n4-n3(cubed)/n3+n2-n-1

Step-by-step explanation:

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1.) -9x+8 ≤ 80 * A. x ≥ -8 B. x ≤ -8 C. x ≥ 8 D. x ≤ 8

Firlakuza [10]

Answer:

$x\geq -8$

Step-by-step explanation:

$-9x+8\leq 80$

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2 years ago

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Twenty percent of the ice melted. If 680 grams remained, how many grams melted?

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Answer:

−33999/50

Step-by-step explanation:

2/100−680

1/50−680

−33999/50

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3 years ago

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If 3a-2b= 8 and a+3b=7 what is the value of 4a+b?

Fittoniya [83]

Step 1: Find the value of one variable in terms of the other.

$a+3b=7\\a=7-3b$

Step 2: Substitute the value you just found for this variable in the other equation.

$3a-2b=8\\3(7-3b)-2b=8\\21-9b-2b=8\\21-11b=8\\21=8+11b\\13=11b\\\frac{13}{11}=b\\ b=1\frac{2}{11}$

Step 3: Use your new value for the second variable to find the first.

$a+3b=7\\a+3(1\frac{2}{11})=7\\a+3\frac{6}{11}=7\\\\a=3\frac{5}{11}$

Now that we know the values for a and b we can find the value of 4a+b.

$4a+b\\4(3\frac{5}{11})+1\frac{2}{11}\\12+\frac{20}{11}+1\frac{2}{11}\\\\12+1\frac{9}{11}+1\frac{2}{11}\\\\\boxed{15}$

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3 years ago