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3 years ago

The sum of two numbers is 20. One number is one less than twice the second number. What are the two numbers?

Mathematics

2 answers:

murzikaleks [220]3 years ago

7 0

Answer: Hope this helps.

13, 7

Step-by-step explanation:

Number one is 13

Number two is 7

Well 7 x 2 = 14, 14-1 = 7, and 7+13 = 20 making the answers true.

I figured out this number by eliminating numbers, I started with 5, ended with 8 to make a range of the possible numbers. Since 5 was too low and 8 was too high I knew the number had to be either 6 or 7, so I did 7 and I got the answer.

LuckyWell [14K]3 years ago

3 0

Answer:

7 and 13

You can set up a simple equation to solve this: x + (2x-1) = 20

The x stands for the second, smaller number because the larger number is one less than twice it. When added together, they equal 20.

Now, you just solve for x. It goes as follows:

x + 2x - 1 = 20

3x - 1 = 20

3x = 21

x = 7

Since one number is 7, the other number has to be 13 to add up to 20.

Hope this helps!!! :)

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Please solve asap pls x

mr Goodwill [35]

Answer:

$x=\frac{26}{5}$

Step-by-step explanation:

$\frac{10x+4}{7}=8$

Multiply both sides by 7:

$\longmapsto$ $\frac{7\left(10x+4\right)}{7}=8\times \:7$

$\longmapsto$ $10x+4=56$

Subtract 4 from both sides:

$\longmapsto$ $10x+4-4=56-4$

$\longmapsto$ $10x=52$

Divide both sides by 10:

$\longmapsto$ $\frac{10x}{10}=\frac{52}{10}$

$\longmapsto$ $x=\frac{26}{5}$

_____________________

5 0

3 years ago

Read 2 more answers

What is the leading coefficient of the polynomial function? y=-x^4+4x^2

attashe74 [19]

<h3>Answer: -1</h3>

Explanation:

The given equation is the same as y = -1x^4+4x^2

The leading term is the term with the largest exponent, so it's -1x^4

The leading coefficient is the coefficient of the leading term.

In short, we circle the first coefficient we see. This is assuming that the polynomial is in standard form where the exponents decrease when going from left to right.

6 0

2 years ago

What are the dimensions of a rectangular wall that can be constructed with 400 feet of brick that will maximize the area enclose

ollegr [7]

Answer:

The dimensions of the wall are 100 ft x 100 ft

Step-by-step explanation:

we know that

The perimeter of a rectangular wall is

$P=2(x+y)$

where

x is the length

y is the width

we have

$P=400\ ft$

$400=2(x+y)$

simplify

$200=x+y$

$y=200-x$ ----> equation A

The area of a rectangular wall is equal to

$A=xy$ ----> equation B

substitute equation A in equation B

$A=x(200-x)\\A=-x^2+200x$

This is the equation of a vertical parabola open downward (because the leading coefficient is negative)

The vertex represent a maximum

Convert the quadratic equation in vertex form

$A=-x^2+200x$

Factor -1

$A=-(x^2-200x)$

Complete the square

$A=-(x^2-200x+100^2)+100^2$

$A=-(x^2-200x+10,000)+10,000$

Rewrite as perfect squares

$A=-(x-100)^2+10,000$ ----> equation in vertex form

The vertex is the point (100,10,000)

The x-coordinate of the vertex represent the length of the wall for a maximum area

$x=100\ ft$

Find the value of y

equation A

$y=200-(100)=100\ ft$

therefore

The dimensions of the wall are 100 ft x 100 ft

4 0

3 years ago

I need help with these math problem ASASP! Please! The first question....

Mkey [24]

From x equals five to nine, the y value changes as follows
+10,+2,+1,+3
Assuming that "average" implies the mean, the sum of all four values is 15. Then divide 15 by the four values added = 15/4 = 3 3/4 or 3.75

4 0

3 years ago

Cuong has a small collection of flying discs. Find the area of two discs with a diameter of 12 inches.

Bad White [126]

Answer:

Around 226.2

Step-by-step explanation:

if diamater = 12

radius = 6

6^2 = 36

and 36 times π = around113.1

113.1 times 2 = 226.2

its not exactly 226.2

3 0

3 years ago