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Naya [18.7K]
2 years ago
9

Simplify the following expression 8x+9-6x-7

Mathematics
2 answers:
kiruha [24]2 years ago
6 0
1) both 8x and -6x are the same form - they’re just a coefficient with a variable, while 9 and -7 are just plain numbers. move the expression around as shown in the picture: 8x - 6x + 9 - 7. now coefficients with variables are next to each other, while plain numbers are next to each other, making it easier to solve.
2) now solve: 8x - 6x is 2x, and 9 - 7 is 2. now you have 2x + 2, which is the final answer.

i don’t know if i explained it very well, but if you look at the picture you should be fine.
mamaluj [8]2 years ago
4 0
8x + -6x = 2x 2 + 2x
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<img src="https://tex.z-dn.net/?f=7%20%5Cfrac%7B2%7D%7B3%7D%20%20" id="TexFormula1" title="7 \frac{2}{3} " alt="7 \frac{2}{3}
sammy [17]

Answer:

7 \frac{2}{3}=\frac{7*3+2}{3}=\frac{23}{3}

7 \: \frac{1}{2}=\frac{7*2+1}{2}=\frac{15}{2}

5842 \div 23=254

8 0
3 years ago
15 is the same as the product of 3 and a number. Which equation models this sentence?
adelina 88 [10]

Question

15 is the same as the product of 3 and a number. Which equation models this sentence?

15=3x

15=x-3

15=3+x

15=x divided by 3

Answer:

<h2>15=3x</h2>

Step-by-step explanation:

15 = 3x

x = 15 : 3

x = 5

.........................

check

15 = 3 * 5

15 = 15

the answer is good


3 0
3 years ago
Read 2 more answers
Select the correct answer.
vesna_86 [32]

The highlighted part of the triangle is an angle. It is on the inside of the triangle and formed by two sides coming together.

Hope this helps! :)

7 0
2 years ago
Read 2 more answers
The ratio of boys to girls in a group is 7:1. If there are 66 more boys than girls, work out how many girls there are
nevsk [136]

Answer:11

Step-by-step explanation:

Boys : girls=7:1

Sum of ratio=7+1=8

Let them number of girls be y

Then they number of boys=y+66

Total number of pupils=y+y+66

Total number of pupils=2y+66

Number of girls=(girls ratio)/(sum of ratio) x (total number of pupils)

y=1/8 x (2y+66)

Cross multiply

y x 8=2y + 66

8y=2y + 66

Collect like terms

8y-2y=66

6y=66

Divide both sides by 6

6y/6=66/6

y=11

The number of girls is 11

4 0
2 years ago
The diagram shows a length and angle measure in a scale drawing of a triangular roof truss. In the actual roof truss, the length
marishachu [46]

corresponding to AB is 38 feet, the length of the side corresponding to BC is 22 feet, and their included angle measures 115°. For

what length BC is the scale drawing correct?

4 0
3 years ago
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