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postnew [5]
3 years ago
5

Hi! I need help with this problem: 5^2-(2x7^2)

Mathematics
1 answer:
Ahat [919]3 years ago
7 0
5^2=25
25-(2x7^2)
7^2=49
25-(2x49)
49x2=98
25-98=-73
Answer= -73
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Does the following system of equations have a solution? If so, find one. If not, explain why not. 2x+y+z=4, x-y+3z=-2, -x+y+z=-2
Elena-2011 [213]

Answer:x=2, y=1, z=-1

Step-by-step explanation:

Given

2x+y+z=4----1

x-y+3z=-2----2

-x+y+z=-2----3

Add 2 & 3 we get

4z=-4

z=-1

Put value of z in 1 & 2

2x+y-1=4

2x+y=5----3

x-y+3(-1)=-2

x-y=1------4

add 3 & 4 we get

x=2

Put x & z in 1

y=1

5 0
3 years ago
An employee earns $480 per week. They are entitled to 4% vacation pay. How much vacation pay should they receive per week?
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Answer:

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3 years ago
Simplify completely <br> (x+1/1-x)(x+2/x^2)
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Answer:

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Step-by-step explanation:

3 0
4 years ago
What’s 0.92 in a percent
Paladinen [302]

Answer:

Express 0.92 as a percent

Step-by-step explanation:

Multiply both numerator and denominator by 100. 0.921 × 100100 = 92100.

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8 0
3 years ago
A piece of cardboard has been cut into a rectangle with side lengths represented by 9.5x+14.3y cm and 11.7x+22.8y cm. What is th
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Given:

Sides of a rectangle are 9.5x+14.3y cm and 11.7x+22.8y cm.

To find:

The perimeter of the cardboard in terms of x and y.

Solution:

We know that, perimeter of a rectangle is

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Now,

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On combining like terms, we get

Perimeter=2[(9.5x+11.7x) +(14.3y+22.8y)]

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using distributive property, we get

Perimeter=2(21.2x) +2(37.1y)

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Therefore, the perimeter of the cardboard in terms of x and y is 42.4x+74.2y cm.

4 0
3 years ago
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