Answer: Hal
Step-by-step explanation:
47.5/250 = $0.189
Cal pays $0.189 per pencil
59.50/350 = $0.17
Hal pays $0.17 per pencil
49.5 mph
I hope it’s helped.
Answer:
its c
Step-by-step explanation:
mark brainlist
The value of x and y in the equation -5x + 8y = -21 and 3x - 4y = 15 are 9 and 4 respectively.
<h3>What is an equation?</h3>
An equation is the statement that illustrates that the variables given. In this case, two or more components are taken into consideration to describe the scenario. It is vital to note that an equation is a mathematical statement which is made up of two expressions that are connected by an equal sign.
The equation is given as:
-5x + 8y = -21
3x - 4y = 15
Multiply equation i by 3
Multiply equation ii by 5
-15x + 24y = -63
15x - 20y = 75
Add both equations
4y = 12
Divide
y = 12/4
y = 3
From 3x - 4y = 15
3x - 4(3) = 15
3x - 12 = 15
Collect like terms
3x = 12 + 15
3x = 27
Divide
x = 27/3
x = 9
Therefore, x = 9 and y = 4.
Learn more about equations on:
brainly.com/question/2972832
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7/9 = 7/9
140/180=7/9
they are proportional
the fractions + the same thing