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miskamm [114]
3 years ago
13

Estimate the solution to the system of equations. You can use the interactive graph below to find the solution.−3x+3y=9 2x−7y=−1

4 ​

Mathematics
1 answer:
hjlf3 years ago
5 0

Answer:

  (x, y) = (-1.4, 1.6)

Step-by-step explanation:

The graph shows the solution pretty clearly. It seems no estimation is required.

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System OT<br> W + b =13<br> 6.5w + 2b = 57.5
mixer [17]

Answer:   w = 7,  x = 6

Step-by-step explanation:  Solve by substitution

W + b = 13

rewrite as   b = 13 - w  and substitute that value for b in the second equation

6.5w + 2b = 57.5  Then solve for w

6.5w + 2(13-w) = 57.5 . Distribute

6.5w + 26 - 2w = 57.5 .  Subtract 26 from both sides. Combine like terms and simplify

6.5w - 2w = 57.5 - 26

4.5w = 31.5  Divide both sides by 4.65

w = 7 . Substitute 7 for w in the first equation and solve for b

7 + b = 13 . Subtract 7 from both sides

b = 6

6 0
3 years ago
Negative one fourths times negative six elevenths
Ipatiy [6.2K]

You multiply fractions simply by multiplying numerators and denominators with each other:

-\dfrac{1}{4} \times \left(-\dfrac{6}{11}\right) = \dfrac{1 \times 6}{4 \times 11} = \dfrac{6}{44} = \dfrac{3}{22}

3 0
3 years ago
542 increased by 1/4 of itself is?
Bas_tet [7]
542(1+1/4)

542(4/4+1/4)

542(5/4)

677.5


5 0
3 years ago
Read 2 more answers
How to tell if an equation is linear without graphing
Inessa05 [86]

Answer:

A linear equation has the greatest x power at 1.

If you see an equation with only x (no x^2 or x^3 or stuff like that), you will know that it is linear.

7 0
2 years ago
The expression 2(a+b)=−8.1 for certain values of a and b. Find the value of the following expressions for the same values of a a
marusya05 [52]

Answer:

2.025

Step-by-step explanation:

In this problem, you don't necessarily need to find the exact values of a and b. Rather, find the value of (a+b) first, and then you can substitute it into the next equation. First, you can divide both sides of the first equation 2(a+b)= -8.1 by 2, to get (a+b)=-4.05. Now, subsitute the value of (a+b) into the second equation, -0.5(a+b), to get -0.5(-4.05). From here, you can calculate that -0.5 times -4.05 is  2.025. Hope this helped!

4 0
3 years ago
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