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4 years ago

-3x +2y= 4 4x-13y=5 solve by elimination

Mathematics

1 answer:

Svet_ta [14]4 years ago

4 0

I am better at substitution, but you want to get the equations as similar as possible, but are the opposite, so you can cancel it out.

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Which of the following are solutions to the following equation?

Alecsey [184]

Answer:

x=-7

x=7

Step-by-step explanation:

we have

$2x^{2}-98=0$

Solve for x

Adds 98 both sides

$2x^{2}-98+98=0+98$

$2x^{2}=98$

Divide by 2 both sides

$2x^{2}/2=98/2$

$x^{2}=49$

take square root both sides

$x=\pm7$

therefore

The solutions are

x=-7

x=7

8 0

4 years ago

Help me! What is the answer to this question!? Provide a step by step explanation please.

zmey [24]

Answer:

x = -5 or x= 2

Step-by-step explanation:

|-4x-6| = 14

There are two solutions, one positive and one negative

-4x-6 = 14 -4x-6 = -14

Add 6 to each side

-4x-6+6 = 14+6 -4x-6+6 = -14+6

-4x = 20 -4x = -8

Divide by -4

-4x/-4 = 20/-4 -4x/-4 = -8/-4

x = -5 x = 2

3 0

3 years ago

Read 2 more answers

Which of the following statements best describes the graph of x + y =2?

andre [41]

Step-by-step explanation:

so x+y=2

a line would have to go 0,2 2,0

so the answer would be D

4 0

3 years ago

Expand each expression In 4y5/x2

nordsb [41]

Answer:

$\ln 4 -2 \ln x +5 \ln y$

Step-by-step explanation:

$\ln \dfrac{4y^5}{x^2}\\\\=\ln(4y^5) - \ln(x^2)~~~~~~~~~~~;\left[ \log_b\left( \dfrac mn \right) = \log_b m - \llog_b n \right]\\\\=\ln 4 + \ln y^5 - 2\ln x~~~~~~~~~~~~;[\log_b m^n = n \log_b m ~\text{and}~\log_b(mn) = \log_b m + \log_b n ]\\\\=\ln 4 + 5 \ln y -2 \ln x\\\\=\ln 4 -2 \ln x +5 \ln y$

3 0

2 years ago

Read 2 more answers

What times what equals -40 and add to make -3

Alekssandra [29.7K]

Answer:

-8 and 5

Step-by-step explanation:

-8 × 5 = -40

-8 + 5 = -3

6 0

3 years ago