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Art [367]
3 years ago
12

What is the solution to the equation 7(a – 10) = 13 – 2(2a 3)?

Mathematics
2 answers:
geniusboy [140]3 years ago
7 0
7(a - 10) = 13 - 2(2a + 3)
7a - 70 = 13 - 4a - 6 = 7 - 4a
7a + 4a = 7 + 70
11a = 77
a = 77/11 = 7
a = 7.
valina [46]3 years ago
3 0

Answer:

a=7

Step-by-step explanation:

we have

7(a-10)=13-2(2a+3)

Solve for a

7a-70=13-4a-6

Group terms that contain the same variable and move the constants to the other side

7a+4a=13-6+70

Combine like terms

11a=77

Divide by 11 both sides

a=7

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What is the distance around a triangle that has measuring 2 1/8 feet,3 1/2 feet, 2 1/2 feet
N76 [4]

Perimeter: 2 1/8 + 3 1/2 + 2 1/2 = 7 (1 + 4 + 4)/8 = 7 9/8 = 8 1/8

Hope this will help you!

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3 years ago
Which expressions have products less than 3 3/5?<br> (Select all that apply)
Sergeeva-Olga [200]
1, 3 and 4.

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2 years ago
Please help me I wanna get out this class
snow_lady [41]
Cut a line between the triangle and rectangle
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4 0
2 years ago
The sum of three numbers is 72
LekaFEV [45]

Answer: <u><em>The first number is 8</em></u>

Step-by-step explanation: Let the three No. s be x, y and z respectively

given = x+ y+ z= 72

y=7x

z=7x-18

∴As we know x+ y+ z=72

i.e. x+7x+7x-18=72

15x=72+18=90

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∴y=7x

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∴z=7x-18

56-18=38

∴<u><em>The first no. is x=8</em></u>

<u><em>The second no. is y=7x = 56</em></u>

<u><em>The third no. is z=7x-18 = 38</em></u>

6 0
3 years ago
Read 2 more answers
Find the slope and the y-intercept of the linear equation: y= -7x+2
saul85 [17]

Answer:

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Step-by-step explanation:

: y = -7x+2

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7 0
3 years ago
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