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pav-90 [236]
3 years ago
12

Solve the system of equations

Mathematics
2 answers:
Brums [2.3K]3 years ago
8 0
5x+4y = 73
-4x + 4y = -8

5x + 4y -(-4x+4y) = 73 -(-8)
5x + 4y + 4x - 4y = 81
5x + 4x + 4y - 4y = 81
9x = 81
x = 81÷9
x = 9

Substitute x = 9 into any of the equations to find y.

5(9) + 4y = 73
45 + 4y = 73
4y = 73 - 45
4y = 28
y = 28÷4
y=7

Answers :
x = 9
y = 7
Nadya [2.5K]3 years ago
3 0

Answer:

(9,7)

Step-by-step explanation:

(9,7)

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3 years ago
The afternoon temperature is 42.4°F and falls at a steady rate of 1.2°F per hour for 6
tankabanditka [31]

answer :

13.6

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1.2*6=7.2

42.4-7.2=35.2

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4 0
2 years ago
about 70,000 people live in a circular region with a 30-mile radius. find the population density in people per square mile.
bezimeni [28]

Solve for the area of the circular region first:

A = pi*r^2

A = pi*(30 mi)^2

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Density = 70000 people/2827.43 mi^2

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4 0
3 years ago
The volume of a large aquarium is 210 yd. It is 3 yd wide and 2
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Length of the aquarium is 35 yd

Step-by-step explanation:

  • Step 1: Volume of the aquarium = 210 yd³ given by Volume = length × width × height. Width = 3 yd and Height = 2 yd

Length = Volume/Width × Height

            = 210/3 × 2 = 210/6

            = 35 yd

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3 years ago
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