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melomori [17]
3 years ago
8

Which value for x makes the open sentence true? 7⋅x+1=2⋅x2−3 5 4 3 2

Mathematics
2 answers:
marshall27 [118]3 years ago
7 0

Answer:

4

Step-by-step explanation:

7⋅x+1=2⋅x2−3

When x = 4

7* 4 + 1  = 2* 4² - 3

28 + 1    = 2 * 16 -3

         29 = 32 - 3

         29 = 29

Rudiy273 years ago
4 0

Answer:

Easy math :) your answer is B. 4

Step-by-step explanation:

i hope this helps, plz mark brainliest

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7 0
3 years ago
Solve for x. 4x-4&lt; 8<br> AND 9x +5 &gt; 23<br> is it a, b,c or d ?
Alex

Answer:

A)\displaystyle2 <  x   < 3

Step-by-step explanation:

A compound inequality is an inequality that combines two simple inequalities

we are given that

\displaystyle 4x - 4 < 8 \  \: \text{and} \:  \: 9x + 5 > 23

<u>solving</u><u> </u><u>x </u><u>for</u><u> the</u><u> first</u><u> equation</u><u>:</u>

\displaystyle 4x - 4 < 8

add 4 to both sides:

\displaystyle 4x  < 12

divide both sides by 4 and since we are dividing both sides by a positive number the inequality won't swap

\displaystyle x  < 3

<u>solving</u><u> </u><u>x </u><u>for</u><u> the</u><u> </u><u>second</u><u> equation</u><u>:</u>

\displaystyle 9x + 5 > 23

cancel 5 from both sides:

\displaystyle 9x  > 18

divide both sides by 9 and since we are dividing both sides by a positive number:

\displaystyle x  > 2

therefore by combining the equations we obtain:

\displaystyle\boxed{2 <  x   < 3}

hence,

our answer is A)

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3 years ago
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Answer:

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Step-by-step explanation:

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