Solve the system of equations using elimination: 8x - 8y = 0 and -5x - 7y= -12.

Mathematics

1 answer:

Lena [83]1 year ago

5 0

Answer:

My answers were (1,1) for both lmk if it works ;)

Step-by-step explanation:

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mr.wilson bought 4 tires for $390.60. If each tire cost $90 before tax was added. What tax rate did he pay on the tires?

elixir [45]

First calculate after tax tire price
$390.60 / 4 = $97.65 after tax price per tire
take the $97.65 divided by 90
97.65 / 90 = 1.085
1.085 is the rate of tax he paid per tire

4 0

2 years ago

Simplify (4x^2 + 12x - 9) + (7x^2 - x + 3)

jasenka [17]

Answer:

The correct answer is 11x² + 11x - 6

Step-by-step explanation:

The given expression is,

(4x² + 12x - 9) + (7x² - x + 3)

<u>Simplify the given expression</u>

(4x² + 12x - 9) + (7x² - x + 3) = 4x² + 12x - 9 + 7x² - x + 3

= 4x² + 7x² + 12x - x - 9 + 3

= 11x² + 11x - 6

Therefore the simplified form of given expression is 11x² + 11x - 6

3 0

2 years ago

Read 2 more answers

an isosceles triangle has two sides of 18 centimeters. It’s height is 14 centimeters. What is the length of the base of the tria

marta [7]

Answer:

252cm

Step-by-step explanation:

18/2=2

9*14=126

126*2=252

6 0

2 years ago

A sidewalk of width 2 feet is being built around a pool. Which expression represents the area of the sidewalk?

Molodets [167]

I would assume it's the area of both the sidewalk and pool combined (79ft x 49ft = 3,871) minus the area of the pool alone (75ft x 45ft = 3,375). The area of the sidewalk would then be 496 ft $x^{2}$ .