Mathematics: Help pls. cant figure it out.

Help pls. cant figure it out. - id13723373, toogie

jaimechristopher2002

12.07.2021

$\longrightarrow{\green{a\:=\:2}}$

$\large\mathfrak{{\pmb{\underline{\purple{Step-by-step\:explanation}}{\purple{:}}}}}$

➡ $\:4a + 1 = a + 7$

Combining like terms, we have

➡ $\:4a - a = 7 - 1$

➡ $\:3a = 6$

➡ $\:a = \frac{6}{3}$

➡ $\:a = 2$

$\large\mathfrak{{\pmb{\underline{\blue{To\:verify}}{\blue{:}}}}}$

➪ $\: 4 \times 2 + 1 = 2 + 7$

➪ $\: 8 + 1 = 9$

➪ $\: 9 = 9$

➪ $\: L.H.S.=R. H. S$

Hence verified.

$\red{\large\qquad \qquad \underline{ \pmb{{ \mathbb{ \maltese \: \: Mystique35}}}}}$

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SmolBeanPotato

17.10.2021

34.4 miles

Step-by-step explanation:

Mathematically;

z-score = x-mean/SD

from the question, we have mean as 29 and standard deviation as 3.6 with z-score as 1.5

So we need to find the z-score here

1.5 = x-29/3.6

3.6 * 1.5 = x-29

5.4 = x-29

x = 29 + 5.4

x = 34.4

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