Twice a number, minus 13

Answers

Answer 1

Answer:

The solution of the expression twice a number, minus 13 in numeral form, is 2x-13

A collection of constants, variables or numbers connected using one or more arithmetic operator is called an expression

Example = 4y, 3x+4.

The given expression in numeral form is represented as:

Assume, the unknown variable be x.

The twice of the number is 2x.

Further, subtracting 13 from the 2x results in 2x-13.

Thus, the solution of the expression twice a number, minus 13 in numeral form is 2x-13.

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Answer 2

Answer: Twice a number, minus 13
Answer: 2n - 13

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What is the y-intercept of the equation of the line that is perpendicular to the line y = 3/5 x + 10 and passes through the point (15, –5)?The equation of the line in slope-intercept form is y = -5/3 x +

Answers

Answer:

$\large\boxed{y-intercept=20}$

Step-by-step explanation:

$\text{Let}\ k:y=_1x+b_1\ \text{and}\ l:y=m_2x+b_2.\n\nl\ \perp\ k\iff m_1m_2=-1\to m_2=-(1)/(m_1)\n============================\n\n\text{We have}\ y=(3)/(5)x+10\to m_1=(3)/(5).\n\n\text{Therefore}\ m_2=-(1)/((3)/(5))=-(5)/(3).\n\n\text{The equation of the searched line:}\ y=-(5)/(3)x+b.\n\n\text{The line passes through }(15,\ -5).$

$\text{Put thecoordinates of the point to the equation.}\ x=15,\ y=-5:\n\n-5=-(5)/(3)(15)+b\n\n-5=(-5)(5)+b\n\n-5=-25+b\qquad\text{add 25 to both sides}\n\nb=20\n\n\boxed{y=-(5)/(3)x+20}$

How I start step by step

Answers

It’s finding the area but with more numbers so start from the bottom and work your way up

72:64 = 9: ___
what is the answer?

Answers

The equivalent ratio is calculated as: 9:8

How to find the ratio?

Ratio is defined as the relative size of two quantities expressed as the quotient of one divided by the other; the ratio of a to b is written as a:b or a/b.

Proportion is defined as an equality between two ratios.

We are given that the ratio is 72:64.

This is equivalent to 72/64

If the numerator is broken down to 9 it means the denominator will be divided by 8 to get 64/8 = 8.

Thus, the equivalent ratio is 9:8

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it's 8 because 72 divide 9 is 8 and 64 divide 8 is 8

Two circles have the same radius. Is the combined area of the two circles the same as the area of a circle with twice the radius? Explain.

Answers

ok so area=pir^2

2 circles with same area=2pir^2

circle with 2 times radius=pi(2r)^2=pi4r^2=4pir^2

is 2 circles with same area equal to circle with 2 times radius?
is 2pir^2=4pir^2?
is 2=4?
no

therfor the answer is no

it is because the radius is squaered so the doubled gets doubled makng it quadrupuled when the first one only gets doubled

Kelly wants to buy a magazine that is $25 later the magazine was marked up an additional 20% what is the new price?

Answers

(20÷100)×$25
=$5
There for
$25+$5
=$30

A Greek runs along a distance of 16,300 feet. About how many miles long is the creek?

Answers

At first I was afraid that you were making an ethnic stereotype.
You can't imagine how relieved I was when I read to the end
and discovered that it was only a typo, un-proofread.

1 mile = 5,280 feet

(16,300 feet) x (1 mile / 5,280 feet) = (16,300 / 5,280) mile = 3.087... mile .

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