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sesenic [268]
3 years ago
11

Select the correct answer from drop down menu.

Mathematics
1 answer:
alexgriva [62]3 years ago
4 0

Answers:

First one is 130r

and

Second one is n(r*r)

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Eight times a number plus five another number is -13. The sum of the two numbers is 1. What are the numbers?
Pani-rosa [81]
Eight *(a number) plus 5*(another number) is -13.

translates to:

8(x) + 5(y) = -13

The sum of (the number) and (the other number) is 1.

translates to:

(x) + (y) = 1


We have a system of two equations involving two unknowns: x and y.

\rm 8x+5y=-13\\
~~x+~~y=~~~~1

We can easily solve the system using Substitution or Elimination. Let's use Elimination this time.

We'll multiply the second equation by -8 so that the x's match up.

\rm ~~~8x+5y=-13\\ -8x-8y=-8

When we add the equations together, the x's will fall out of the equation, summing to zero. The 5y and -8y will sum to -3y and the right hand side will sum to -21.

\rm -3y=-21

Divide by -3,

\rm y=7

Plug back into one of your original equations to find the value of x,

\rm x+y=1\\
x+7=1

Subtract 7,

\rm x=-6
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3 years ago
Answer for brainilest 11 points
TEA [102]

Answer:

729 is 3 to the power of 6

Step-by-step explanation:

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3 years ago
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9. Subtract: 5-3 1/3​
Elena-2011 [213]

Answer: 1 and 2/3

Step-by-step explanation:

Imagine 3 1/3 as if it’s in parenthesis as (3 + 1/3)

Subtract three from five.

You should get two.

Then you subtract the last 1/3 from that two.

There are three thirds in one digit.

Therefore, two thirds are left over, plus that last whole digit.

You are left with one and one third.

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3 years ago
Use the expression to complete the statements.
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Answer:

Power

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Exponent

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Step-by-step explanation:

On edge 2020

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A bedroom has a length of x+ 3 feet and a width of x-1 feet. Write a polynomial to express the area of the bedroom. Then calcula
jekas [21]

Answer:

Step-by-step explanation:

Length = x+3

Width = x-1

Area = l*b

where l is the length of the bedroom

and b is the breadth or width of the bedroom

The polynomial can be written as:

Area=(x+3)(x-1)

Now we will find the area of the room when x=10

First we will find the values of length and width.

Length = x+3

Length = 10+3 = 13

Width = x-1

Width = 10-1=9

Now put the values in the formula:

Area=l*b

Area=13*9

Area = 117 square feet....

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3 years ago
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