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3 years ago

PLEASE ANSWER QUICKLY! Simplify –7(x + 10) + 9(x – 4)

Mathematics

2 answers:

sashaice [31]3 years ago

8 0

Answer:

2x - 106 (or x - 53) i hope this helps! :)

Step-by-step explanation:

-7(x + 10) + 9(x - 4)

you need to distribute the -7 with the x and the 10

-7x - 70 + 9(x - 4)

distribute the 9 with the x and -4

-7x - 70 + 9x - 36

combine like terms first the x values

2x - 70 - 36

combine like terms

2x - 106

i dont remember if you divide both by two or not

x - 53 if so x - 53 is the answer

mr_godi [17]3 years ago

3 0

Answer:

2x-106

Step-by-step explanation:

-7(x+10)+9(x-4)

Expand parentheses:

-7x-70+9x-36

Combine like terms:

2x-106

Hope this helps!

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Given :

The length of the sides of the triangle are in the ratio 5:8:10 .
The Perimeter of the Triangle is 115 cm.

To Find :

The length of the sides of the triangle.

Solution :

Let us assume the sides be 5x cm, 8x cm and 10x cm.

We know,

$\qquad{ \bold{ \pmb{Sum \: of \: all \: sides \: of \: the \: triangle = Perimeter_{(Triangle)}}}}$

So, Substituting the values :

$\qquad { \dashrightarrow{ \sf{5x + 8x + 10x = 115}}}$

$\qquad { \dashrightarrow{ \sf{23x= 115}}}$

$\qquad { \dashrightarrow{ \sf{ \dfrac{23x}{23} = \dfrac{115}{23} }}}$

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$\qquad { \dashrightarrow{ \sf{ 5x \: cm= 5 \times 5 \: cm = \bf \: 25\: cm }}}$

$\qquad { \dashrightarrow{ \sf{ 8x \: cm= 8 \times 5 \: cm = \bf \: 40 \: cm }}}$

$\qquad { \dashrightarrow{ \sf{ 10x \: cm= 10 \times 5 \: cm = \bf \: 50 \: cm }}}$

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