Please help don’t understand

Answer:

Step-by-step explanation:

Combine like terms.Like terms have same variable with same exponent

4x³ + 6x - 7 + 3x³ - 5x² - 5x + 9 = 4x³ + 3x³ - 5x² + 6x - 5x  - 7 + 9

                                                  = 7x³ -5x² + x + 2

Answer:

bueh

Step-by-step explanation:

Answer:

m(slope)=2

b(y-intercept)=5

Step-by-step explanation:

Answer:

2x represents the slope and 5 represents the y intercept.

Answer:

3notebooks

2pens

the pens are 1.75 each

total is 12.47

i wouldnt use any of these

12.47-(2x1.75)=? then divide that by three and you get each notebook

but

c...

Answer:

10%

Step-by-step explanation:

0.08×anumber=40,then 0.02x=?

x=40/0.08=500

0.02×500=10

Answer:

Yes.

Step-by-step explanation:

Substituting x = 2 into y = 2x + 1,

y = 5

Substituting x = 2 into y = 4x - 3

y = 5

Answer:

(ab)^n = a

Step-by-step explanation:

It basically says to take the entire equation in the parentheses and multiply by the exponent, sorry for the horrible handwriting

Answer:

[tex]m = 26[/tex]

Step-by-step explanation:

Given

See attachment for missing details

Required

Determine the gas mileage for the trip

First, we calculate the miles driven

[tex]Miles = 476 + 439 + 382 + 263[/tex]

[tex]Miles = 1560[/tex] --- d

Next, we calculate the amount of gas used

[tex]Gas = 15.0 + 13.5 + 15.4 + 16.1[/tex]

[tex]Gas = 60.0[/tex] ---- g

The gas mileage is then calculated as:

[tex]m = \frac{d}{g}[/tex]

[tex]m = \frac{1560}{60}[/tex]

[tex]m = 26[/tex]

Hence, the gas mileage is 26 miles per gallon

0.83Answer:

Step-by-step explanation:

83% means 83 per 100 or 83/100 if you divide 83 by 100 you get 0.83

Answer:

.83

Step-by-step explanation:

to turn a percentage into a number you have to divide by 100, meaning you need to move the decimal point to the left 2 times so you get:

.83

hope this helps!!

Answer:

0.018

Step-by-step explanation:

basta yan ang sagot

Answer: 0.018

Step-by-step explanation: insta: camryn_boeling

Answer:

Step 1 should be (14.4+18)...PEMDAS

Step-by-step explanation:

The expression Rakim wrote for step 1 is incorrect therefore the correct solution will give 5.45.

An equation is an expression that shows the relationship between two or more numbers and variables.

We are given an expression as;

1/12(14.4+18)+2.75.

Part A;

Rakim starts to evaluate the expression.

Step 1: first solve the bracket;

1/12(14.4+18)+2.75.

1/12(32.4) + 2.75.

2.7+ 2.75.

= 5.45

The expression Rakim wrote for step 1 is incorrect therefore the correct solution will give 5.45.

Learn more about equations here;

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#SPJ2

Answer:

explain

Step-by-step explanation:

Answer:

Step-by-step explanation:

8q+6=4q-14

minus 4q from both sides to get

4q+6=-14

-6 from both sides

4q=-20

divide by 4

q=-5

we can check if this is right by implementing -5 as a substitute for q

-40+6=-20-14

-34=-34

Answer:

[tex]S_{15} = 299593[/tex]

Step-by-step explanation:

Given

[tex]262144,\ 32768,\ 4096,\ 512; ...[/tex]

Required

Determine the 15th partial sum

The nth partial sum of a geometric series is:

[tex]S_n = a* \frac{1 - r^n}{1 - r}[/tex]

In this case:

[tex]a = 262144[/tex]

[tex]n = 15[/tex]

r is calculated as:

[tex]r = \frac{32768}{262144}[/tex]

[tex]r = 0.125[/tex]

Substitute values for a, r and n in [tex]S_n = a* \frac{1 - r^n}{1 - r}[/tex]

[tex]S_{15} = 262144* \frac{1 - 0.125^{15}}{1 - 0.125}[/tex]

[tex]S_{15} = 262144* \frac{1}{0.875}[/tex]

[tex]S_{15} = \frac{262144* 1}{0.875}[/tex]

[tex]S_{15} = \frac{262144}{0.875}[/tex]

[tex]S_{15} = 299593.142857[/tex]

[tex]S_{15} = 299593[/tex] -- approximated

Answer:240

Step-by-step explanation:You get 240 because 60X4 is 240. to get the 4, you need to use 100-20, then therer would be 80. 80 divided by 20 is 4, which is the amount of water.

Ms. Maryna needed 240g water to add to 60g of sugar to make a syrup that is 20% concentrated

Given that,

Ms. Maryna need to add to 60g of sugar to make a syrup that is 20% concentrated.

We have to determine,

How much water does she need.

According to the question,

Ms. Maryna need to add to 60g of sugar to make a syrup that is 20% concentrated.

If  Maryna need 20% sugar by mass,

Then,

[tex]= \dfrac{20}{100} = \dfrac{1}{5}[/tex]

It is 1/5 of the total mass is sugar,

And ,

Total water needed is,

[tex]= 1-\dfrac{1}{5} \\\\=\dfrac{5-1}{5}\\\\= \dfrac{4}{5}[/tex]

It needed 4\5 times of water.

Then,

Maryna needed times as much water as sugar,

[tex]= \dfrac{4}{5} \times \dfrac{5}{1}\\\\= 4 \ times[/tex]

Maryna needed 4 times as much water as sugar.

Maryna need water to add in syrup = 4 × 60g = 240g.

Hence, Maryna needed 240g of water to add to make a syrup.

To know more about Multiplication click the link given below.

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Answer:

Step-by-step explanation:

22.2

Answer:

22.2

Step-by-step explanation:

Answer:

the answer is A cause you divide 7 by 140 and the answer is 22 so 20 is the closest

Answer:

D

Step-by-step explanation:

On the X side they add 2 every time to reach the next number needed. For example if it was to keep going the nect x would be 13

Answer:4:1

Step-by-step explanation: you have to find the unit rate ( how much for 1) so you set 3 to equal 1 and to do that you divide by three so you do that to the 12 also

The answer for your question will be...3:12

Answer:

Matching the scenario with the correct type of problem:

a. one mean

b. one proportion

c. one proportion

d. one mean

Step-by-step explanation:

A one-proportion problem is tested using the one-sample proportion test.  This estimates the proportion of a population by comparing the proportion to a target or reference value.  On the other hand, a one-mean problem is tested using the one-sample t-test.  This tests whether a population mean is significantly different from some hypothesized value.

Answer:

r=1

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

5r−−17r−4r−9=9

5r+17r+−4r+−9=9

(5r+17r+−4r)+(−9)=9(Combine Like Terms)

18r+−9=9

18r−9=9

Step 2: Add 9 to both sides.

18r−9+9=9+9

18r=18

Step 3: Divide both sides by 18.

18r/18 = 18/18

r=1

Use the two endpoints to find the slope:

(0,2) and ( 5,5.5)

Slope = change in y over change in x:

Slope = (5.5-2)/(5-0) = 3.5/5 = 0.7

The y intercept is the y value when x is 0, which is 2

Equation: c = 0.7x + 2

Answer:

Volume of syrup A = 120 quarts

Volume of syrup B = 280 - 120 = 160 quarts .

Step-by-step explanation:

Syrup A : 2 parts sugar , 8 parts of water .

Total = 10 parts

Syrup B : 3 parts sugar , 5 parts of water .

Total = 8 parts .

Mixture required 280 quarts , 3 parts sugar , 7 parts water

In 280 quarts , sugar = 280 x 3  / ( 3 + 7 )

sugar = 84 parts

Let volume of syrup A be x , volume of syrup B = 280 - x

sugar A =  2 x / 10 = 0.2 x

sugar B = 3 ( 280 - x ) / 8 = .375 ( 280 - x )

Total sugar =  .2 x + .375 ( 280 - x ) = 84 .

.2 x + 105 - .375 x = 84

105 - 84 = .375 x - .2 x = .175 x

.175 x = 21

x = 21 / .175 = 120

Volume of syrup A = 120 quarts

Volume of syrup B = 280 - 120 = 160 quarts .

John mixes 120 quarts of syrup A and 160 quarts of syrup of B together to get 280 quarts of syrup that is 3 parts sugar and 7 parts water.

Given that,

John has two different sugar syrups.

Syrup A is 2 parts of sugar and 8 parts of water, and Syrup B is 3 parts of sugar and 5 parts of water.

We have to determine,

How much of each should john mix together to get 280 quarts of syrup that is 3 parts sugar and 7 parts water.

According to the question,

Syrup A: 2 parts sugar, 8 parts of water.

Total number of parts = 10 parts

Syrup B : 3 parts sugar, 5 parts of water.

The total number of parts  = 8 parts.

The mixture required 280 quarts, 3 parts sugar, 7 parts water,

In 280 quarts, parts of sugar are,

[tex]= \dfrac{280 \times 3 }{ ( 3 + 7 )}\\\\= \dfrac{280 \times 3}{10}\\\\= 84[/tex]

Let the volume of syrup A be x,

And the volume of syrup B be 280 - x

[tex]Sugar\ A = \dfrac{2x}{10} \\\\Sugar \ A = 0.2 x[/tex]

[tex]Sugar \ B = \dfrac{3 ( 280 - x ) }{8 }\\\\Sugar \ B= .375 ( 280 - x )[/tex]

The total amount of sugar is,

[tex]0.2 x + 0.375 ( 280 - x ) = 84 \\\\0.2 x + 105 -0 .375 x = 84\\\\105 - 84 = 0.375 x - 0.2 x = 0.175 x\\\\ 0.175 x = 21\\\\x = \dfrac{21}{0.175}\\\\x = 120[/tex]

Therefore,

The volume of syrup A = 120 quarts

Volume of syrup B = 280 - 120 = 160 quarts

Hence, John mixes 120 quarts of syrup A and 160 quarts of syrup of B together to get 280 quarts of syrup that is 3 parts sugar and 7 parts water.

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Answer:

C. 65/100 = x/90

Step-by-step explanation:

65% of 100 is 65/100 as 65% of 90 is x/90.

You can find the correct answer by cross multiplying to see if the part / whole = percent / 100.

Answer:

(x-6)(x-8)=0

Step-by-step explanation:

x^2-14x+48=0

Factorizing

x^2-8x-6x+48=0

(x^2-8x)+(-6x+48)=0

x(x-8)-6(x-8)=0

(x-6)(x-8)=0

Answer:

about 8.3 miles an hour.

Step-by-step explanation:

34/4 is 8.5

90/11 is 8.2

average: 8.3