4 years ago

What are the answers to these questions ?

Mathematics

1 answer:

chubhunter [2.5K]4 years ago

8 0

90000000000000000000000000000000000000000

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To train for an upcoming marathon, Alvin runs 9 miles a day. If Alvin runs 9 miles every day for 30 days, how many total miles w

nydimaria [60]

Answer:

Step-by-step explanation:

if he runs 9 miles a day for 30 days thats 9x30 its pretty simple math all you have to do is multiply it should be 270 miles in total. np abt the spammage

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3 years ago

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Zarrin [17]

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If the unit of measurment is inches the answer is->

87.48inches

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If (x − 2)^2=49, then x could be ?

Ket [755]

$(x - 2)^2=49\\ \\ x^2-4x +4 -49=0\\ \\x^2-4x -45 = 0\\ \\\Delta = b^{2}-4ac = (-4)^{2}-4*1* (-45)= 16+180=196 \\ \\x_{1}=\frac{-b-\sqrt{\Delta }}{2a} =\frac{4-\sqrt{196}}{2}=\frac{4-14}{2}=\frac{-10}{2}=-5 \\ \\x_{2}=\frac{-b+\sqrt{\Delta }}{2a} =\frac{4+\sqrt{196}}{2}=\frac{4+14}{2}=\frac{18}{2}=9 \\ \\Answer : \ x=-5 \ or \ x= 9$