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gtnhenbr [62]
4 years ago
7

THIS IS URGENT! add 7-9=7+(-9)

Mathematics
2 answers:
Burka [1]4 years ago
7 0

Answer:

-3=3

<h2><em>Hope this helps!!!</em></h2>
Klio2033 [76]4 years ago
6 0

Answer:

=3

Step-by-step explanation:

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Convert 7 yards 2 feet to inches. <br><br> 7 yd 2 ft <br> =<br> __ in.
zavuch27 [327]
First, you can convert yards to feet, to make it easier to simplify feet to inches. There are 3ft in a yard, so you can say that there are 3ft*7+2ft. 3*7 is 21, and adding 2 to that you will have 23ft. from here you can convert that directly to inches. If there are 12 inches in a foot, you will multiply 12 by 23. Your final answer will be 276in.
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3 years ago
Please help me, I will give brainliest and 13 points!
mario62 [17]

The solutions of the system of equations are (0 , 13) , (3 , 34)

Step-by-step explanation:

To solve an system of equations, one of them linear and the other is quadratic do that

  • Use the linear equation to find one variable in terms of the other variable
  • Substitute this variable in the quadratic equation
  • Solve the quadratic equation to find the values of the other variable
  • Substitute the values of the other variable in the linear equation to find the first variable

The system of equation is:

y = x² + 4x + 13 ⇒ (1)

y = 7x + 13 ⇒ (2)

Substitute y in equation (1) by equation (2)

x² + 4x + 13 = 7x + 13

Subtract 13 from both sides

∴ x² + 4x = 7x

Subtract 7x from both sides

x² - 3x = 0

Take x as a common factor

x(x - 3) = 0

Equate each factor by 0

x = 0

x - 3 = 0

Add 3 to both sides

x = 3

The values of x are 0 and 3

Substitute the values of x in equation (2) to find y

When x = 0

y = 7(0) + 13

y = 0 + 13

y = 13

When x = 3

y = 7(3) + 13

y = 21 + 13

y = 34

The values of y are 13 and 34

The solutions of the system of equations are (0 , 13) , (3 , 34)

Learn more:

You can learn more about the system of equations in brainly.com/question/3739260

#LearnwithBrainly

4 0
3 years ago
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