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3 years ago

The sum of 7 times a number and 5 is the same as the difference of the number and 7. Find the number.

Mathematics

1 answer:

kap26 [50]3 years ago

6 0

Answer:

pls mark me a brainliest

let x represent the number

7(x) + 5 = 7 - x

so we now group like terms

7x + x = 7 - 5

8x = 2

we now divide through by 8

$\frac{8x}{8} = \frac{2}{8}$

$x = \frac{1}{4}$

the final answer for the number is 1/4

Hope this will help

Have a good day

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8m²n³-24m²n²+4m³n how do I factor out the GCF

mariarad [96]

Answer:

$8 {m}^{2} {n}^{3} - 24 {m}^{2} {n}^{2} + 4 {m}^{3}n = 4 {m}^{2} n(2 {n}^{2} - 6n + m)$

Step-by-step explanation:

The given expresion is

$8 {m}^{2} {n}^{3} - 24 {m}^{2} {n}^{2} + 4 {m}^{3}n$

Observe that 4 is common to 8,-24, and 4

Observe also that, m²n is common to all the terms.

Hence the GCF is:4m²n

We factor the GCF to get;

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3 years ago

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rewona [7]

Answer:

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Step-by-step explanation:

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CI = x ± z (s / √n)

At 99% confidence, z = 2.58.

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