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Marina CMI [18]
3 years ago
9

I need help what is 3-2y+(-8y)+7.8

Mathematics
2 answers:
Snowcat [4.5K]3 years ago
6 0

Answer:

10.8-10y OR -10y+ 10.8

Step-by-step explanation:

sO: 3-2y-8y+7.8

          3-10y+7.8

10.8-10y / -10y+10.8 Either one

Veseljchak [2.6K]3 years ago
6 0
Changes made to your input should not affect the solution:

(1): "7.8" was replaced by "(78/10)".

STEP
1
:

39
Simplify ——
5
Equation at the end of step
1
:

39
(3 - 10y) + ——
5
STEP
2
:
Rewriting the whole as an Equivalent Fraction

2.1 Adding a fraction to a whole

Rewrite the whole as a fraction using 5 as the denominator :

3 - 10y (3 - 10y) • 5
3 - 10y = ——————— = —————————————
1 5
Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

2.2 Adding up the two equivalent fractions
Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

(3-10y) • 5 + 39 54 - 50y
———————————————— = ————————
5 5
STEP
3
:

Pulling out like terms :

3.1 Pull out like factors :

54 - 50y = -2 • (25y - 27)

Final result :
-2 • (25y - 27)
———————————————
5
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The formula for the perimeter is P = 2<em>w</em> + 2<em>l</em>, where <em>w</em> is the width and <em>l</em> is the length. It is given that the width = (x+2) and the length = (x+6). Therefore, we can make this equation:

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⇒ 64 = 2x + 4 + 2x + 12 ⇒ Combine like terms

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There are several information's of immense importance already given in the question. Based on those information's. the answer can be easily deduced.

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