Please help me :( I really need it.

Answer:

80

Step-by-step explanation:

2.5(2+2) x (2^2+2^2)

2.5(4) x (4+4)

10 x 8

80

your answer is 80 :)

Answer:

80

Hope this helps :3

Answer:

A linear equation is an algebraic equation of the form y=mx+b. Where m is the slope and b is the y-intercept. A linear equation most times is called a "linear equation of two variables," where y and x are the variables.

Step-by-step explanation:

Answer:

3/8 or

2.67 or

2 67/100

Step-by-step explanation:

2.671×100100=267100

8 divide by 3. Take that and convert to fraction or decimal either or.

Answer:

You have to use a cacolator. 5 boxes and its 9 pounds of beans in each. 5x9 is 45 pounds. Rice should be the 80 pounds hope that helps

Step-by-step explanation:

Answer:

Error....

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At least 2 equation needed for the solution of two variables

Answer:

the value of x is 2

Step-by-step explanation:

Answer:

x = 2

Step-by-step explanation:

Given 3 parallel lines intersected by 2 transversals then the parallel lines divide the transversals proportionally, that is

[tex]\frac{3x}{4}[/tex] = [tex]\frac{7.5}{2.5x}[/tex] ( cross- multiply )

7.5x² = 30 ( divide both sides by 7.5 )

x² = 4 ( take the square root of both sides )

x = [tex]\sqrt{4}[/tex] = 2

Answer:

It is a function because the input values are different.

Answer:

D.40:15 are equivalent to the ration of white socks to brown sock which is 8:3

Answer:

6 weeks

Step-by-step explanation:

You need to write an equation for each.

For Andre, he has 100 dollars, and every week gets 5 dollars more. You add the 5 dollars, and Since you don't know how many weeks it has been, use a variable.

For Elena, she has 10 dollars, and gets 20 each week.

Now that you know that it has been 4 weeks, you can plug in 4 for the variable for weeks.

Andrew:100+5(4)=100+20+120

Elena: 10+20(4)=10+80=90

Andrew has more money in this time.

To find when they have the same amount, equal their expressions to each other. This means that they will have the same amount (because they are equalled) and you can solve to find the variable, which means the weeks that they are equal at.

Bring the like terms to each side by canceling them out. Since you have positive 10, then subtract 10 to each side. You have 5w, so subtract 5w to each side.

100+5w=10+20w

90+5w=20w

90=15w

90 divided by 15=6

w=6

Answer:

356.4

r =4

h =12

just put it in this formula

2 pie r ( r + h )

GOOD LUCK FOR THE FUTURE! :)

Answer:

12

Step-by-step explanation:

19.50-4.50=15

15÷1.25=12

Answer: 1 or D

Step-by-step explanation:

Answer:

It's true when x = a positive number.

Step-by-step explanation:

I don't know how to explain this, so here we go.

The definition of absolute value is the distance a number is away from 0.

In other words, all numbers are now positive or 0.

If |-x| = x, it means x would have to be positive because, well, to prove that, we have to see what it couldn't be a negative number

if x was a negative number (-1), this is what we would get

|-(-1)| = -1

|1| = -1

1 = -1

That's not right!

And this happens in any negative number you do.

Because the absolute value of something cannot be negative

I cannot stress that enough

Since it is the absolute value of -x, x has to be positive, if it isn't, then there is no solution for x.

Any number greater than or equal to zero is a possible answer for the absolute value of something, but the absolute value of something cannot be a negative number

I hope this helps, let me know if you have any questions.

Answer:

Dion ran 105 kilometers in 28 days.

Step-by-step explanation:

3.75*28= 105

Dion ran 105 kilometers in 28 days.

Answer:

105 Kilometers

Step-by-step explanation:

3.75 times 28 equals 105.

Answer:

(r+s)(x)=52x+25

Step-by-step explanation:

i dont know how to explain but this is what I choose and it was right.

Answer:

472.5

Step-by-step explanation:

Answer:

Step-by-step explanation:

Base (b) = 30 yd

height (h) = 31.5 yd

Area of the triangle

= 1/2 * b * h

= 1/2 * 30* 31.5

=472.5 yd²

Answer:

2

Step-by-step explanation:

5x - 17

5(3) - 17 = 15 - 17 = -2

let me know if its right or wrong

Answer:

9(v-8)

[line]

v+6

Step-by-step explanation:

Answer:

2 km/h

Step-by-step explanation:

Let x represent the speed of the river current, t₁ be the time spent rowing against the current and t₂ be the time spent rowing with the current.

Since the speed of the still water = 20 km/h.

The speed of rowing against the current = (20 - x)

The speed of rowing with the current = (20 + x)

We know that velocity = distance / time. Hence time = distance / velocity

t₁ = 36 / (20 - x)

t₂ = 22 / (20 + x)

but t₁ + t₂ = 3 hours

Therefore:

3 = 36 / (20 - x) + 22 / (20 + x)

multiply through by 400 - x²

3(400 - x²) = 36(20 + x) + 22(20 - x)

1200 - 3x² = 720 + 36x + 440 - 22x

3x² + 14x -40 = 0

This gives x = -6.7 or x = 2

x cannot be negative therefore x = 2 km/h

The speed of the river current is 2 km/h

Answer:

2km/h is correct

Step-by-step explanation:

The other guy is absolutely correct

Given:

The figure of triangle ABC.

To find:

The measure of angle A.

Solution:

From the given figure, we get

[tex]\angle ABC+120^\circ=180^\circ[/tex]                 (Linear pair)

[tex]\angle ABC=180^\circ-120^\circ[/tex]

[tex]\angle ABC=60^\circ[/tex]

According to the exterior angle theorem, the exterior angle of a triangle is equal to the sum of two opposite interior angles.

[tex]\angle A+\angle ABC=105^\circ[/tex]          (Exterior angle theorem)

[tex]\angle A+60^\circ=105^\circ[/tex]

[tex]\angle A=105^\circ-60^\circ[/tex]

[tex]\angle A=45^\circ[/tex]

Therefore, the measure of angle A is 45 degrees.

Answer:

P = 4(2x + 5)

P = (2x + 5)+(2x + 5)+(2x + 5)+(2x + 5)

Step-by-step explanation:

Given that:

Perimeter of square = 4 * s

Where s = side length

If perimeter, P = 8x + 20

Then,

4s = 8x + 20

Divide both sides by 4

4s / 4 = (8x + 20) / 4

s = 2x + 5

P = 4s

P = 4(2x + 5)

Or

P = 2x + 5 in 4 places

P = (2x + 5)+(2x + 5)+(2x + 5)+(2x + 5)

Answer:

x=0

Step-by-step explanation:

You must isolate the variable to solve for it, so subtracting 14 from the left is the first thing to do. This can be supported by using PEMDAS, whereas we are doing the inverse here to solve for something in the equation. This gives us 2x=0. Next, we have to divide by 2, which gives us x=0.

Answer:

hehe

Step-by-step explanation:

he

Ones that have an answer intersect.

Answer:

4x+10y=-24

-2x+y=-24

2x+11y=-48

48+2x=0

48+11y =0

48=2x

48=11y

48/2 =2x/2

48/11=11y/11

x=24

y= 48/11

Answer:

Multiplication is one of the four elementary mathematical operations of arithmetic, with the other ones being addition, subtraction and division. The result of a multiplication operation is called a product. And division is one of the four basic operations of arithmetic, the ways that numbers are combined to make new numbers. The other operations are addition, subtraction, and multiplication

Answer:

we can tell if line ac is straight

Step-by-step explanation:

Answer:

A) $87.5

B) $164

Step-by-step explanation:

A) Marked Price (Original Price)

= [tex]\frac{Sale Price}{1 -Discount}[/tex]

=[tex]\frac{77}{1-0.12}[/tex]

=87.5

B) Marked Price (Original Price)

=[tex]\frac{Sale Price}{1 -Discount}[/tex]

=[tex]\frac{123}{1-0.25}[/tex]

=164

Answer:

It is its tenth value

Step-by-step explanation:

The 4 in .487 is the tenths value