Combine like terms 2x+3x+2+2x^3

Answer:

7.5

Step-by-step explanation:

Percent Error =  

Vobserved - Vtrue

Vtrue

=  

5.7 - 5.3

5.3

=  

0.4

5.3

=  7.5471698113208%

Answer:7.5

Step-by-step explanation:

Answer:

oop here ya go

Step-by-step explanation:

Answer:

20 minutes

Step-by-step explanation:

Find the speed per km. 2km/8min. This is 4 minutes per km.

Next, multiply the minutes per km by km. 4 min x 5 km.

This equals 20 :)

Answer:

vertical angles

Step-by-step explanation:

vertical angles is the angles opposite each other when two lines across

The value of $3 is 30% of the number $10.

The percentage is a way to express a proportion or a fraction as a fraction of 100. It is commonly used to compare values or quantities relative to a whole or a total.

The term "percentage" comes from the Latin word "per centum," which means "per hundred." It implies that a percentage value represents a certain number out of 100 parts.

To calculate a percentage, you typically divide a part or a quantity by the whole or the total and then multiply the result by 100. The resulting value represents the percentage equivalent of the part or quantity.

The per cent value is calculated as,

[tex]x = \dfrac{3} {10} \times100\\x = 0.3\times100\\x = 30 \%[/tex]

Therefore, the percentage value is 30%.

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Answer:

D: 0,2

Step-by-step explanation:

the horizontal line is the x-axis (the first number) and the vertical line is the y-axis (the second number) it goes across the x-axis 0, times making 0 the first number and goes up the y-axis 2 times making 2 the second number and the only ordered pair that matched those numbers is D: 0,2

Hope i helped you!

Answer:

how much hours and where is it going.

Step-by-step explanation:

Answer:

I believe its "the value of y is 21 more tha the value of x, equation is y= x+21"

Step-by-step explanation:

Answer:

4x^2-25x-19

Step-by-step explanation:

First off you got to distribute all the negative signs that were given. After distributing you gotta do it again to the remaining then after that, you must combine all like terms and get rid of them.

Answer: 25 girls

Step-by-step explanation:

Answer:

The answer is b

Step-by-step explanation:

Answer: The answer is B

Step-by-step explanation:

I don't know how to explain it but I am sorry if it is wrong

Answer:

f=2

Step-by-step explanation:

0.3+0.5f-0.7

Move the varibale (0.5f) to the left-hand side and change it's sign to negative.

-0.5+0.3+-0.7

Move the constant to the right hand side and change it's sign

-0.5f=-0.7-0.3

Calulate the differnce

-0.5f=-1

divide both sides by -0.5

F=2

I could have paid $30 more dollars for the toy than I actually paid.

A percentage is a value per hundredth. Percentages can be converted into decimals and fractions by dividing the percentage value by a hundred.

Given, You win an online auction for a toy and your winning bid of $90 is 75% of your maximum bid.

Assuming 'x' is the maximum amount I could have paid for the bid.

Therefore, 75% of 'x' is $90 which is,

(75/100)×x = 90.

0.75x = 90.

x = 90/0.75.

x = 120.

So, The amount of more money I could have actually paid is,

(120 - 90)

= $30.

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Answer:

i think the 2nd one

Step-by-step explanation:

Answer:

y = x+40

Step-by-step explanation:

First, calculate the rate of the rate by using the slope formula, [tex]m = \frac{y_1-y_2}{x_1-x_2}[/tex].

m = (50-47)/(10-7) = 3/3 = 1

Now plug m = 1 into the slope-intercept form, y = mx+b. Also plugin y = 42 and x = 2 in other to find the y-intercept (b).

42 = 1(2)+b

42-2 = b

b = 40

Replace b with 40 in the slope-intercept formula.

y = x+40

Answer:

c. 84

Step-by-step explanation:

120 times .70 = 84

Answer:

C. BC ≅ EC

hopes this helps :)

Answer:

Line AC is congruent to line DC (top answer)

Step-by-step explanation:

If a point is a midpoint of a line, then each half of the line (AC and DC in this case) is equal

Answer:

Answer is all of the students in David's school.

Step-by-step explanation:

I hope it's helpful!

Answer:

All the students in his school.

Step-by-step explanation:

The population would be all of the kids in his school because he has to ask every person to get accurate results.

Answer:

1)

angle 2WZX = angle ZYX ( Since all angles and sides of a rhombus are equal)

ZYX = 2 x 29.5

59

2)

4x - 10 =90 (since all angles of a rhombus intersect at 90°)

x=90+10/4

x=100/4

x=25

hope this helps

Answer:

Part A - Angle d is 29º

Part B - Angle e is 61º

Part C - Angle f is 95º

Part D - the box represents a 90º angle

Step-by-step explanation:

Angle d is 29º because of the vertical angles theorem

Angle e is 61º because if you take into account that it tells you one of the angles is 90º, you'll add d, which is 29º, to that in order to get 119. Then you'll subtract 119 from 180, as all the angles in a triangle must have a sum of 180º degrees. The result should be 61º

Although it looks rather acute, f should be 95 degrees because it's a supplementary angle with 85º, meaning you subtract 85 from 180

The box in the triangle is just a symbol indicating a 90º angle

Step-by-step explanation:

Hope it helps please give me brainliest

Answer:

36%

Step-by-step explanation:

x = 600, so you need to find 6% of 600, which is 36%

:)

Answer:

36

Step-by-step explanation:

Answer:

Sam is 24 years old and his mother is 48 years old.

Step-by-step explanation:

Equations

Let's call

x   = Sam's current age

Since Sam's mother is twice as old as Sam:

2x = Sam's mother current age

x + 12 = Sam's age in 12 years

2x - 12 = Sam's mother age 12 years ago

These two last expressions are equal:

x + 12 = 2x - 12

Subtracting x and adding 12:

x = 24

2x = 48

Sam is 24 years old and his mother is 48 years old.

Sam, is 24 years old. His mom is 48 years old.

Answer:

The original price was $90.

Step-by-step explanation:

Let j represent the original price.  Then, subtract 20% from 100%, obtaining 80%.  The markdown price is 80% of j, or 0.80j = $72

Solving for j, we get j = $72/0.80 = $90

Answer:

86.40

Step-by-step explanation:

86.4 rand 72 plus 14.4 equals 86.40

Answer: 4x+12

Step-by-step explanation:

The distributive property states that a(b+c) = ab+ac.

Thus, simply do 2*2x+2*6 = 4x+12

Hope it helps <3 :D

Answer:

A reflection over the y-axis

Step-by-step explanation:

Answer:

A long history with corrected blemishes exhibits that though mistakes were made, they were corrected which allows for those viewing your credit history to know that you've learned to fix mistakes making you trustworthy and experienced.

Step-by-step explanation:

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