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3 years ago

SOMEBOODY HELP ME SOLVE THIS PLS!! 1.4x-10=5x+15 2.2x+2=2x+2

Mathematics

2 answers:

Rus_ich [418]3 years ago

8 0

Answer:

x = -25

x = infinite solutions

Step-by-step explanation for 1:

4(-25) - 10 = 5(-25) + 15

-100 - 10 = -125 + 15

-110 = -110

Step-by-step explanation for 2:

Both equations are the exact same. So whatever number you put, the answer will be right

Readme [11.4K]3 years ago

6 0

Answer:

$1)4x - 10 = 5x + 15 \\ 4x - 5x = 15 + 10 \\ - x = 25 \\ x = - 25$

$2)2x + 2 = 2x + 2 \\ 2x - 2x = 2 - 2 \\ 2x(1 - 1) = 0 \\ x = 0$

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stich3 [128]

Answer:

Carl has to sell at least $8$ cookies.

$c\geq 7.5$

Step-by-step explanation:

Carl gets $\$1.50$ by selling 1 chocolate bar.

Earning from chocolate bars:

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$Let\ total\ number\ of\ cookies=c\\\\Cost\ of\ 1\ cookie=\$2\\\\Earning\ from\ cookies=2\times c=2c$

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7 0

3 years ago

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Vinil7 [7]

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6 0

3 years ago

What is the vertex of the graph of y = x^2+ 4x?

xxTIMURxx [149]

Answer:

(-2, -4)

Step-by-step explanation:

You can complete the square of the equation to get

y+(4/2)^2 = x^2+4x+(4/2)^2

y+4 = x^2 + 4x + 4

y+4 = (x+2)^2

y = (x+2)^2 - 4

This gives the form y = a(x-h)^2 + k where (h, k) is the vertex of the equation. You can also arrive at the same conclusion by making some observations of the equation. (x+2)^2 minimum value is going to be 0 since and negative values resulting from x+2 is going to become positive because of the square. So the minimum value is when x+2 is 0 or when x is equal to -2 and when it's at that minimum value of 0 it's going to have 4 subtracted from it which gives the vertex of (-2, -4)

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2 years ago

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lubasha [3.4K]

rechecking this answer with your lecturer. Tq