7a = 28 Is a=21 a solution? yes or no

Mathematics

2 answers:

bagirrra123 [75]2 years ago

4 0

No, because 7 x 21 is 147.

vovangra [49]2 years ago

3 0

Answer:

Step-by-step explanation:

No because if a = 21, then 7 * 21 = 147 and 147 is not 28.

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T is the midpoint of SU. Find ST, TU and SU. 10x-14 5x+16 S———T———U

jeka94

since T is the midpoint of SU, then ST = TU.

$\bf \stackrel{10x-14}{\boxed{S}\rule[0.35em]{10em}{0.25pt}} T\stackrel{5x+16}{\rule[0.35em]{10em}{0.25pt}\boxed{U}} \\\\\\ \stackrel{ST}{10x-14}=\stackrel{TU}{5x+16}\implies 5x-14=16\implies 5x=30\implies x=\cfrac{30}{5}\implies x=6 \\\\[-0.35em] ~\dotfill\\\\ \stackrel{ST}{10(6)-14\implies 46}~\hfill \stackrel{TU}{TU=ST=46}~\hfill \stackrel{SU}{ST+TU=92}$

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The answer is 37 years old.

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Divide all factors by 25:
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This is quadratic equation (ax² + bx + c = 0)
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mote1985 [20]

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Step-by-step explanation:

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