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UkoKoshka [18]
3 years ago
8

How many solutions will each system of equations have? y=-2x+5 and 2x + y = -7

Mathematics
1 answer:
lapo4ka [179]3 years ago
7 0

Answer:

no solution

Step-by-step explanation:

Y=-2x + 5 equation 1

2x + y = -7 equation 2

2x + (-2x+5)=-7 substitute y value from equation 1 into equation 2

2x + -2x + 5 = -7

0 +5=-7

5=-7

no solution

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Cassie wants to buy carpet to cover her whole living room, except for the tiled floor. The tiled floor is 4
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Answer:

1456

Step-by-step explanation:

56x2x13

56x26

1456

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2 years ago
How would you solve 3x^2-12=0?
Gennadij [26K]

                                                                                 3x^2 - 12  =  0

Personally, I would divide each side by 3                x^2 - 4  =  0

Then I would add 4 to each side                              x^2        =  4

Then I would take the square root of each side:     x  =  +4
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Having found both solutions, I would relax with a cup of tea.

3 0
4 years ago
Find the value of z please help
Elza [17]

z + 93 = 180

z = 87

Answer z = 87

Here are the answer for x and y, in case you need them.

x = 2* 93 - 112

x = 186 - 112

x = 74

y = 2 * 80 - x

y = 160 - 74

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6 0
4 years ago
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Can someone please help me with this?
olchik [2.2K]
Hi there! The answer is $98

When something becomes 0% more expensive it means that the prices have remained the same as the price last year. Since the price last year was $98, the price this year is also $98.
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4 years ago
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Find an explicit formula for f(n). ​
soldi70 [24.7K]

Answer:

f(n) = 2n - 2

Step-by-step explanation:

Given the recursive formula

f(n) = f(n - 1) + 2 with f(1) = 0, then

f(2) = f(1) + 2 = 0 + 2 = 2

f(3) = f(2) + 2 = 2 + 2 = 4

f(4) = f(3) + 2 = 4 + 2 = 6

The terms of the sequence are 0, 2, 4, 6, ....

These are the first 4 terms of an arithmetic sequence with explicit formula

f(n) = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here d = 2 - 0 = 4 - 2 = 6 - 4 = 2 and a₁ = 0, thus

f(n) = 0 + 2(n - 1), that is

f(n) = 2n - 2 ← explicit formula

5 0
4 years ago
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