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Lady bird [3.3K]
2 years ago
11

8x+9y=-28 -4x=y solve the system by subsitution

Mathematics
2 answers:
bixtya [17]2 years ago
8 0

Answer:

x= 1

y = -4

Step-by-step explanation:

8x + 9y = -28

-4x = y

8x + 9(-4x) = -28

8x - 36x = -28

-28x = - 28

x = 1

y = -4(1) = -4

Zielflug [23.3K]2 years ago
6 0

Answer:

2

Step-by-step explanation:

8 + 9 = 17

17y = 28

28 / 17 = 1.64

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#18. estimate the perimeter and the area of the shaded figure to the nearest tenth
Gelneren [198K]

Answer:

Area = 22.3 m^2

Perimeter 27.4 m^2

Step-by-step explanation:

Perimeter = __ m

Area __ m^2

The area of the triangle is about 4.2,

The area of the square is 4,

The area of the semicircle is 14.1,

14.1 + 4.2 + 4 = 22.3

Area = 22.3 m^2

9.4 + 6 + 4 + 4 + 4 = 27.4

Perimeter = 27.4 m^2

Therefore the area of the shape is about 22.3 m^2 and the perimeter is about 27.4 m^2.

6 0
2 years ago
If six bags of coffee cost $43.92, how much will 15 bags of coffee cost?
Naily [24]

Answer:

43.92/6=7.32

7.32(cost per bag)*15=$109.80

6 0
3 years ago
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Which of the following equation has x = 0 as a solution?
Sophie [7]

Step-by-step explanation:

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3 0
2 years ago
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Please help im so confused!?
sergejj [24]
I think the answer is D) 24/25.

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6 0
3 years ago
The Science Club went on a two-day field trip. The first day the members paid $50 for transportation plus
Anastasy [175]

Answer:

145 + 33n

Step-by-step explanation:

Let

n = number of members in the club

Day 1:

Cost = 50 + 18n

Day 2:

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Total cost two-day field trip = day 1 + day 2

= (50 + 18n) + (95 + 15n)

= 50 + 18n + 95 + 15n

= 145 + 33n

Total cost two-day field trip = 145 + 33n

An expression that represents the total cost in dollars for two days for the n members of the club is given by 145 + 33n

4 0
3 years ago
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