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wariber [46]
3 years ago
14

3x 2 -7x + 4 from 5x 2 - 3x + 8.

Mathematics
1 answer:
zhenek [66]3 years ago
5 0

Answer:

2x^2 +4x +4

Step-by-step explanation:

5x ^2 - 3x + 8 - (3x ^2 -7x + 4)

Distribute the minus sign

5x ^2 - 3x + 8 - 3x ^2 +7x - 4

I like to put them vertically

 5x ^2 - 3x + 8

- 3x ^2 +7x - 4

-----------------------

2x^2 +4x +4

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7 0
3 years ago
Which term is the question
Pani-rosa [81]

Answer:

trinomial

Step-by-step explanation:

Given polynomial has three terms, therefore it is a trinomial.

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3 years ago
A 25% acid solution must be added to a 40% solution to get 240 liters of 30% acid solution. How many of each should be used ?
schepotkina [342]

Answer:

The number of liters of 25% acid solution = x = 160 liters

The number of liters of 40% acid solution = y = 80 liters

Step-by-step explanation:

Let us represent:

The number of liters of 25% acid solution = x

The number of liters of 40% acid solution = y

Our system of Equations =

x + y = 240 liters....... Equation 1

x = 240 - y

A 25% acid solution must be added to a 40% solution to get 240 liters of 30% acid solution.

25% × x + 40% × y = 240 liters × 30%

0.25x+ 0.4y = 72...... Equation 2

We substitute 240 - y for x in Equation 2

0.25(240 - y)+ 0.4y = 72

60 - 0.25y + 0.4y = 72

Collect like terms

- 0.25y + 0.4y = 72 - 60

0.15y = 12

y = 12/0.15

y = 80 Liters

Solving for x

x = 240 - y

x = 240 liters - 80 Liters

x = 160 liters

Therefore,

The number of liters of 25% acid solution = x = 160 liters

The number of liters of 40% acid solution = y = 80 liters

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2 years ago
What is the range of fx=(3/4)x - 4
vichka [17]

The answer is {y|y>−4}

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3 years ago
A teacher Ask for students To write three side lengths that will not make a triangle and describe why.
Ulleksa [173]

Answer:

2, 5, 9

Step-by-step explanation:

The two shorter sides added together must be longer than the third side or they cannot make a triangle.

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3 years ago
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