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3 years ago

1.-4x+7=11 2. 17=5y-3

Mathematics

2 answers:

nlexa [21]3 years ago

5 0

Answer:

1.) 4x+7=11 ==> x=1

2.) 17=5y-3 ==> y=4

Step-by-step explanation:

1,) 4x+7=11 2.) 17=5y-3

4x=11-7 17+3=5y

4x=4 20=5y

x=4/4 20/5=y

x=1 y=4

jasenka [17]3 years ago

3 0

Answer:

1. x= -1

2. y= 4

Step-by-step explanation:

1. -4x + 7 = 11 2. 17 = 5y -3

-4x + 7-7= 11 -7 17 + 3 = 5y -3 +3

-4x = 4 20 = 5y

x= 4/-4 20/5 = y

x = -1 4 = y

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2 years ago

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Step-by-step explanation:

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3 years ago

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3 years ago

I need help, urgently.

Korvikt [17]

Answer:

y = -0.5(x - 4)^2 + 5.

y = -0.5x^2 + 4x - 3.

Step-by-step explanation:

The vertex is at (4, 5). so we have:

f(x) = a(x - 4)^2 + 5

When x = 0 y = -3 so substituting in the above:

- 3 = a(0-4)^2 + 5

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So the vertex form is y = -0.5(x - 4)^2 + 5.

Standard form:

y = -0.5(x^2 - 8x + 16) + 5

y = -0.5x^2 + 4x - 8 + 5

y = -0.5x^2 + 4x - 3.

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3 years ago