2 years ago

When solving inequalities the inequality is reversed when:

2 answers:

8 0

When we multiply or divide and inequality by a positive integer but it doesn’t change but if we multiply or divide an inequality with a negative integer the sign of it will be changed

Anettt [7]2 years ago

7 0

When we multiply or divide an inequality by a negative integer.

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Step-by-step explanation:

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Solve the inequality −8 ≤ z + 6.4

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Answer:

-14.4<or=z

Step-by-step explanation:

-8-6.4or = z+6.4-6.4

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2 years ago

Jose asks his friends to guess the higher of two grades he received on his math tests. He gives them two hints. The difference o

AlekseyPX

Answer : 96

x – y = 16 --------> equation 1

$\frac{1}{8} x +\frac{1}{2} y = 52$

x is the higher grade and y is the lower grade

We solve the first equation for y

x - y = 16

-y = 16 -x ( divide each term by -1)

y = -16 + x

Now substitute y in second equation

$\frac{1}{8} x +\frac{1}{2} ( -16 + x ) = 52$

$\frac{1}{8} x - 8 + \frac{1}{2} x = 52$

$\frac{1}{8} x + \frac{1}{2} x - 8 = 52$

Take common denominator to combine fractions

$\frac{1}{8} x + \frac{4}{8} x -8 = 52$

$\frac{5}{8} x - 8 = 52$

Add 8 on both sides

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We know x is the higher grade

96 is the higher grade of Jose’s two tests.

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3 years ago

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Solve the system of equations by elimination. <br><br> 2x + 2y = -2<br><br> 3x - 2y = 12

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Answer:

Step-by-step explanation:

2x + 2y = -2

3x - 2y = 12

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x = 2

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3 years ago

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Answer:

165 ver una pelicula de terror, 137.5 (138) ver una novela, y 247 ver una pelicula de ciencia ficcion.

Step-by-step explanation:

0.3 x 550 = 165

0.25 x 550 = 137.5 --> 138

165 + 138 = 303

550 - 303 = 247

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3 years ago