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mezya [45]
2 years ago
14

Hello! I need the answer to the question showed in the picture below

Mathematics
2 answers:
RUDIKE [14]2 years ago
8 0

Answer:Answer:

−78+−12=−138

Step-by-step explanation:

The fractions have unlike denominators. First, find the Least Common Denominator and rewrite the fractions with the common denominator.

LCD(-7/8, -1/2) = 8

Multiply both the numerator and denominator of each fraction by the number that makes its denominator equal the LCD. This is basically multiplying each fraction by 1.

(−78×11)+(−12×44)=?

Complete the multiplication and the equation becomes

−78+−48=?

The two fractions now have like denominators so you can add the numerators.

Then:

−7+−48=−118

This fraction cannot be reduced.

The fraction

−118

is the same as

−11÷8

Convert to a mixed number using

long division for -11 ÷ 8 = -1R3, so

−118=−138

Therefore:

−78+−12=−138

Solution by Formulas

Apply the fractions formula for addition, to

−78+−12

and solve

(−7×2)+(−1×8)8×2

=−14+−816

=−2216

Reduce by dividing both the numerator and denominator by the Greatest Common Factor GCF(22,16) = 2

−22÷216÷2=−118

Convert to a mixed number using

long division for -11 ÷ 8 = -1R3, so

−118=−138

Therefore:

−78+−12=−138

padilas [110]2 years ago
5 0
Answer: -11/8

you need to find the common denominator which is 8 so the equation changes to
-7/8 + (-4/8)

since both are negatives you just add them together and then put your answer as a negative and get
-11/8

which is the answer as an improper fraction
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Step-by-step explanation:

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<h3 /><h3>Step 1</h3>

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<h3>Step 3</h3>

Solve the equation for x

\int\limits^{\infty}_x {0.4e^{-0.4t}} \, dt =0.01\\\\\frac{0.4e^{-0.4t}}{-0.4}=0.01\\\\-e^{-0.4t} |^\infty_x =0.01\\\\e^{-0.4x}=0.01

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<h3>Results</h3>

The costumer has to wait x = 11.53 mins ≅ 12 mins to get a free hamburger

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