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Harman [31]
2 years ago
13

Solve for x if: y = -6 and -10x + 7y = 18 A) 8 B)-18 C)-6 D)9

Mathematics
1 answer:
solong [7]2 years ago
4 0

Answer:

Step-by-step explanation:

-10x+7(-6)=18

-10x-42=18

      +42 +42

___________

-10x/-10=60/-10

x= -6

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Hallar la altura(h) de un triángulo que tiene una base 12 metros y un área de 96
frez [133]

Answer:

Height of triangle = 16 meter

Step-by-step explanation:

Given:

Area of given triangle = 96 squares meter

Base length of triangle = 12 meter

Find:

Height of triangle

Computation:

Area of triangle = (1/2)(b)(h)

Area of given triangle = (1/2)(Base length of triangle)(Height of triangle)

96 = (1/2)(12)(Height of triangle)

96 = (6)(Height of triangle)

Height of triangle = 96 / 6

Height of triangle = 16 meter

3 0
3 years ago
I understand the switching of positive and negative signs but I don’t understand how to get to the next step which is the answer
Finger [1]
2ab - 3a = a.(2b-3)

now the same thing

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Understood?

6 0
3 years ago
the cost of plastering a wall of a room having length 8m and heights 4m at Rs 15 per m² is Rs 1560 . find the cost of carpeting
Effectus [21]

Step-by-step explanation:

here ,

length = 8m

height=4m

Rate of plastering 4 walls = 15/m^2

Cost of plastering 4 wall = Rs 1560

Area of floor = Cost of plastering / Rate of plastering

= 1560/15

= 104

again,

Area of four wall = 2h(l+b)

or, 104= 2×4(8+b)

or, 104 =8(8+b)

or, 104/8=8+ b

or,13 - 8= b

or, b= 5

again,

Area of floor= l×b

= 8×5

= 40

again,

Rate of carpeting the floor= 300/ m^2

Area of floor = 40 m^2

cost of carpeting=Rate × Area

= 300×40

= 12000

4 0
3 years ago
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Basile [38]

Answer:

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Step-by-step explanation:

7 0
3 years ago
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dsp73

Answer:

C. 90

Step-by-step explanation:

mark it brainliest if it helps you ❤️

3 0
2 years ago
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