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tankabanditka [31]
3 years ago
10

Which expression is equivalent to the expression below? (4x + 2y - z) - (x - y + 7)

Mathematics
1 answer:
Margaret [11]3 years ago
5 0

Answer:

3x+3y−z−7

Step-by-step explanation:

"Let's simplify step-by-step.

4x+2y−z−(x−y+7)

Distribute the Negative Sign:

=4x+2y−z+−1(x−y+7)

=4x+2y+−z+−1x+−1(−y)+(−1)(7)

=4x+2y+−z+−x+y+−7

Combine Like Terms:

=4x+2y+−z+−x+y+−7

=(4x+−x)+(2y+y)+(−z)+(−7)"(Mathpapa)

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3 years ago
A motorist drives for m hours at 120km/hr and n hours at 18km/hr. Altogether Somina drives 78km in 5 hours. Find m and n.​
nikdorinn [45]

Answer:

(0.118, 4.882)

Step-by-step explanation:

If a motorist drives for m hours at 120km/hr, then the Distance of the motorist is expressed as;

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If he drives n hours at 18km/hr;

db = 18 * n

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Speed of the motorist altogether is expressed as;

Speed =78km/5hrs

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120m + 18n = 78 ....1 ..... * 1

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m + n = 5....2 ...*18

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Hence (m,n) is (0.118, 4.882)

3 0
3 years ago
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