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3 years ago

Twice a number is equal to 35 more than 7 times the number. Find the number.

Mathematics

2 answers:

masya89 [10]3 years ago

7 0

Answer:

-7

Step-by-step explanation:

make an equation-

2x=35+7x

-5x=35

x=-7

nikklg [1K]3 years ago

7 0

Answer:

-7

Step-by-step explanation:

number - n

Twice a number - 2n

Seven times the number - 7n

2n = 7n +35

7n-2n = -35

5n = -35

n = - 7

Check:

2(-7) = 7(-7) +35

-14 = -49 + 35

-14 = -14 True

The number is (- 7).

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Based on the line of best fit, which of these statements is true?

lara31 [8.8K]

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3 years ago

Which expression is not equivalent to the other three? 2x 2 2x 3x – 8 4 7x – 2 –2 5x 2x – 4 8x – x – 6.

erik [133]

The expression is not equivalent to $\rm 28x-16$ .

<h2>Polynomial</h2>

An expression of more than two algebraic terms, basically sums of terms and variables of power n.

<h2>Given</h2>

$2x+2 ,\ 2x,\ 3x-8, 4,\ 7x-2,\ -2,\ 5x,\ 2x-4,\ 8x,\ -x-6$

<h2>Step by step explanation</h2>

$\rm Equivalent\ expression = add\ all\ the\ given\ terms.\\
Equivalent\ expression = 2x+2+2x+3x-8+4+7x-2-2+5x+2x-4+8x-x-6\\
Equivalent\ expression = 2x+2x+3x+7x+5x+2x+8x-x+2-8+4-2-2-4-6\\
Equivalent\ expression = 28x-16\\
$

Then the expression is not equivalent to $\rm 28x-16$ .

Thus, the expression is not equivalent to $\rm 28x-16$ .

More about the polynomial link is given below.

brainly.com/question/17822016

7 0

2 years ago

A cone-shaped tent has a diameter of 12 ft and a height of 6 ft.

HACTEHA [7]

Volume should be 226.08
volume of a cone= 1/3 pi radius squared multiplied by height
6x6=36 multiply by height 36x6=216 divide by 3=72 now multiply by pi =226.08
your answer is 226.08

7 0

3 years ago

Read 2 more answers

A scientist wishes to estimate the mean breaking strength of a certain type of steel rod within 3.0 psi with 95% confidence. Bas

yaroslaw [1]

Answer:97 rods

Step-by-step explanation:

The number of steel rods for 95% confidence level

$n=\left ( \frac{Z_\frac{\alpha }{2}\times \hat{\sigma }}{E} \right )^2$