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zimovet [89]
3 years ago
11

How do I do this question 9q - 15 = -78

Mathematics
2 answers:
liubo4ka [24]3 years ago
7 0
-78 + 15 = -69
-69/9 = -7
q=-7
Serhud [2]3 years ago
4 0
9q - 15 = -78 9q = -78 + 15 9q = -63 q = (-63):9 q = -7
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Can someone please give me the answers to this? ... please ...
Gelneren [198K]

Step-by-step explanation:

the midpoint between 2 points (x1, y1) and (x2, y2) is simply ((x1+x2)/2, (y1+y2)/2).

so,

1.

(9, 7) to (4, -3)

midpoint is ((9+4)/2, (7+ -3)/2) = (13/2, 4/2) = (6.5, 2)

2.

(-7, -5) to (2, 1)

midpoint is ((-7+2)/2, (-5+1)/2) = (-5/2, -4/2) = (-2.5, -2)

3.

now we have the midpoint and need the second point.

(4, 2) over (3, 4) to (x, y)

3 = (4 + x)/2

6 = 4 + x

x = 2

4 = (2 + y)/2

8 = 2 + y

y = 6

4.

(-2, 1) over (-3, 2) to (x, y)

-3 = (-2 + x)/2

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4 = 1 + y

y = 3

5 0
2 years ago
Angie an Kenny play online video games. Angie buys 1 software package and 3 months of game play. Kenny buys 1 software package a
Sati [7]

Answer:

One month of gameplay costs $15

Step-by-step explanation:

Angie: 20 + 3x

Kenny: 20 + 2x

(20 + 3x) + (20 + 2x) = 115 --- add their costs together

(20 + 20) + (3x + 2x) = 115 --- collect like terms

40 + 5x = 115 --- simplify

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x = 15 --- divide both sides by 5

4 0
3 years ago
Which of the following names the figure in the diagram below?
Inessa05 [86]

Answer:

E

Step-by-step explanation:

its the only one that make sense

6 0
3 years ago
Using what you know about angles and triangles, what is the measure of angle 6?
zvonat [6]
∠4 = 90  (verticallyopposite)
∠2 = 68 (verticallyopposite)

∠6 = ∠2 + ∠4 (exterior angles = sum of opposite angles)

∠6 = 68 + 90 = 158°

Answer: 158°
7 0
3 years ago
Double my number<br> add four<br> subtract my number <br> and<br> subtract three
Elena L [17]
X is your number

double it means 2 times x or 2x

add 4
2x+4

subtract my number
2x+4-x=x+4

subtract 3

x+4-3=x+1

the result is x+1 or your number plus 1
3 0
3 years ago
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