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VMariaS [17]
3 years ago
11

Why is it necessary to learn how to factor if you can just use the quadratic formula to solve quadratic equations?

Mathematics
1 answer:
xxTIMURxx [149]3 years ago
4 0
Because u might need it in the real world.
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A textbook store sold a combined total of 438 biology and psychology textbooks in a week. The number of psychology textbooks sol
Liono4ka [1.6K]
<h2>Answer:</h2>

Number of biology textbooks sold: 257 textbooks

Number of psychology textbooks sold:​ 181 textbooks

<h2>Explanations:</h2>

Let the total number of biology textbook sold be "a"

Let the total number of psychology textbook sold be "b"

If a textbook store sold a combined total of 438 biology and psychology textbooks in a week, then:

a + b = 438 ................... 1

If the number of psychology textbooks sold was 76 less than the number of biology textbooks sold, then;

b = a - 76 ...................... 2

Substitute equation 2 into 1

a + (a-76) = 438

a + a - 76 = 438

2a = 438 + 76

2a = 514

a = 514/2

a = 257 biology textbooks

From equation 2;

b = a - 76

b = 257 - 76

b = 181 psychology textbooks

Number of biology textbooks sold: 257 textbooks

Number of psychology textbooks sold:​ 181 textbooks

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1 year ago
What is the slope of a line that is parallel to the line y = x + 2?
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Answer:

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Step-by-step explanation:

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3 years ago
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Solving quadratic equations using square roots <br><br> (2/5)(x+3)^2=5
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Identify the description that is described in numbers.
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Age of a dog (age is a number)
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A patio is in the shape of a square, with a lengh of 35 feet. You wish to draw a black line down one diagonal.
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a) 35√2

b) between 25 and 36 (5² and 6²)

c) 49.5 ft

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3 years ago
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