If you multiply an inequality by a negative number _____.

1 answer:

6 0

If you multiply or devide an inequality by a negative, the inequality sign will switch.

Ex. if an inequality with the sign >, is multiplied by a negative, the sign will switch to <.

I hope this answers your question.

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Given 2x+7=27 and 3x+1=28, does 2x+7=3x+1? Explain

serious [3.7K]

No, in 2x+7=27, x=10. In 3x+1=28 x =9, so it doesn't.

7 0

3 years ago

Read 2 more answers

The following question find the value of the variables. If your answer is not an integer leave it in simplest radical form

Margarita [4]

Answer:

option 4

Step-by-step explanation:

using the sine/ cosine ratios in the right triangle and the exact values

cos30° = $\frac{\sqrt{3} }{2}$ , sin30° = $\frac{1}{2}$ , then

cos30° = $\frac{adjacent}{hypotenuse}$ = $\frac{x}{20\sqrt{3} }$ = $\frac{\sqrt{3} }{2}$ ( cross- multiply )

2x = 20 $\sqrt{3}$ × $\sqrt{3}$ = 20 × 3 = 60 ( divide both sides by 2 )

x = 30

and

sin30° = $\frac{opposite}{hypotenuse}$ = $\frac{y}{20\sqrt{3} }$ = $\frac{1}{2}$ ( cross- multiply )

2y = 20 $\sqrt{3}$ ( divide both sides by 2 )

y = 10 $\sqrt{3}$

3 0

2 years ago

I need help plz help

arsen [322]

Answer:

126

Step-by-step explanation:

To solve this, we need to use PEMDAS: Parentheses, exponents, multiplication, division, addition, subtraction

((4 x 8) + 10) x 3

Parentheses - multiplication

(32 + 10) x 3

Parentheses - addition

42 x 3

multiplication

126

3 0

3 years ago

Please solve this and only answer with image

horsena [70]

$\cot^4 A - \cot^2 A = 1\\\\\cot^4 A = 1 + \cot^2 A\\\\\frac{\cos^4 A}{\sin^4 A} = 1 + \frac{\cos^2 A}{\sin^2 A}\\\\\frac{\cos^4 A}{\sin^4 A} = \frac{\sin^2 A}{\sin^2 A}+\frac{\cos^2 A}{\sin^2 A}\\\\\frac{\cos^4 A}{\sin^4 A} = \frac{\sin^2 A+\cos^2 A}{\sin^2 A}\\\\\frac{\cos^4 A}{\sin^4 A} = \frac{1}{\sin^2 A}\\\\\cos^4 A = \frac{\sin^4 A}{\sin^2 A}\\\\\cos^4 A = \sin^2 A\\\\$