A textbook store sold a combined total of 435 psychology and sociology textbooks in a week. The number of sociology textbooks sold was 61 less than the number of psychology textbooks sold. How many textbooks of each type were sold?

Answer:

x=3

Step-by-step explanation:

12 * 3 = 36

50-36=14

Answer:

x=-10

Step-by-step explanation:

2x-8=4x+12

-2x. - 2x

-8=2x+12

-12. - 12

-20 = 2x

-10=x

Answer:

you have to take away the 30 and put in the 70 from there by the 9

Step-by-step explanation:

use conquest of evaluation

Answer:

Step-by-step explanation:

get the latest flash player is required for video playback is unavailable right now because this video is not available for remote playback is

Answer:

i thought it would be - B. ULTRAVIOLET ray

Answer:

9

Step-by-step explanation:

You take the amount of money that the gym membership cost, $55, and you divide that into, the amount of money he has, $495, and then that will leave you with 9 months.

Hope this helps :)))

Answer:

The answer is A

Step-by-step explanation:

(-2,5).......

......

Answer:

UT = 8

Step-by-step explanation:

From the picture, we can make the following equation...

5 + 2x - 6 = x + 6

By solving it we get

5 + 2x - 6 = x + 6

2x - 1 = x + 6

2x = x + 7

x = 7

Therefor if UT = 2x - 6, then UT is equal to...

2x - 6 = UT

2(7) - 6 = UT

14 - 6 = UT

8 = UT

Answer:

what is the answer

i think  29.4

Step-by-step explanation:

The answer is 29.4

I just did it

Answer:

b) b

e) c

f) 2b

Step-by-step explanation:

you look for numbers that can divide them all at once

Answer:

Part A: 3 3/4 Part B: 5 1/4

Step-by-step explanation:

Part A: 3/4x5=3 3/4

Part B: 3 3/4 +1 2/4=5 1/4

Answer:

I believe it is slope

Step-by-step explanation:

Answer:

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Step-by-step explanation:

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Answer:is 5 ^ -2 ????

Step-by-step explanation:

Answer:

-0.14r -0.44

Step-by-step explanation:

trust me

Answer:

Your answer.

4x + 6y = 122.............(1)

5x + 3y = 94............... (2)

(2)*2-(1),,,,

10x+6y-4x-6y = 66

X = 11

Put x value in eq 1 or 2

Y = 13

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Step-by-step explanation:

Answer:

87.5 miles

Step-by-step explanation:

2cm = 25 miles

7/2 = 3.5

3.5 x 25 = 87.5

Answer:

10xy^2

Step-by-step explanation:

Collecting like terms, 6+4=10 and the two y's will make y^2

Answer:

12/20

Step-by-step explanation:

Cos is adjacent/hypotenuse. 12 is adjacent to angle C and 20 is the hypotenuse. 12/20 is the cosine of C.

Answer:$12 dollars and hour

Step-by-step explanation:

7 hours times 5 days a week equals 35 hours. 420/35 hours equals 12 dollars

Answer:

1/2 dozen of one score is 30%.

Step-by-step explanation:

As we know that 1 dozen = 12 units.

1/2 dozen = 1/2 times 12=6 units

1 score = 20 units.

By using this conversion, we get

6/2 times 100=30%

So 1/2 dozen of one score is 30%

Answer: 4 x − 7 = 2 4x-7=2 4x−7=2. Add 7 to both sides. Simplify 2 + 7 2+7 2+7 to 9. Divide both sides by 4.

Step-by-step explanation:

Answer:

x=-14

Step-by-step explanation:

4+x/7=2

-4       -4

x/7=-2

*7    *7

x=-14

Answer:

-1.2

Step-by-step explanation:

Answer:

X= 120

Step-by-step explanation:

Answer:

n = 1

Step-by-step explanation:

So the first step is to simplify the top equation:

(3v + 7) - (8v + 6)

distribute the negative sign to get rid of the second parentheses:

3v + 7 - 8v - 6

now, combine like terms

-5v + 1

Since it says it needs to be equivalent to (-5v + n), n is 1

Answer:

Step-by-step explanation:

Total points Mario scored = total 1-point free throw + total 2-point field goal + total 3-point field goal.

In 80 attempts 1-point free throw, Mario had 75% success rate. That is, Mario had 80 x 75/100 success

80 x 75/100 = 60

Thus, Mario scored 1 x 60 (since for each success, 1 points is added) points = 60

In 60 attempts 2-point field goal, Mario had 90% success rate. That is, Mario had 60 x 90/100 success

60 x 90/100 = 54

Thus, Mario scored 2 x 54 points (since for each success, 2 points are added) = 108

In 60 attempts 3-point field goal, Mario had 25% success rate. That is, Mario had 60 x 25/100 success

60 x 25/100 = 15

Thus, Mario scored 3 x 15 points (since for each success, 3 points are added) = 45

Therefore, the total points Mario scored = 60 + 108 + 45

= 213

Answer:

(3 +/- i*sqrt(151) / 20 (no real solutions)

Step-by-step explanation:

10x^2 - 6x + 4 = -3x

Add 3x to both sides

10x^2 - 6x + 4 + 3x = -3x + 3x

10x^2 - 6x + 4 + 3x = 0

Add like terms

10x^2 - 3x + 4 = 0

We have to use quadratic formula to find the answers

For this equation, a = 10, b = -3 and c = 4

Note: +/- is plus or minus

Quadratic formula:

x = (-b +/- sqrt(b^2 - 4ac)) / 2a

x = (-(-3) +/- sqrt(-3^2 - 4(10)(4))) / 2(10)

x = (3 +/- sqrt(9 - 160)) / 20

x = (3 +/- sqrt(-151) / 20

x = (3 +/- i*sqrt(151) / 20

if there's a "-" sign inside a square root, it will give you an imaginary number.

Example:

-sqrt(9) = -3

sqrt(-9) = 3i (first you will ignore the "- " sign, then square the number. After finding the square root, take that '-' sign and turn it to an "i")

So for sqrt(-151), 151 is not a perfect square, so you will get a decimal number. Leave it as it is:

sqrt(151). We can't forget about the "-". Turn the minus into a sign.

It will be i*sqrt(151)

Imaginary numbers can't be simplified, so this is the answer.

(3 +/- i*sqrt(151) / 20

Answer:

x=120 degrees

Step-by-step explanation:

angle below angle x=y

y=40 because it is corresponding congruent angle

x+y+20=180

x+40+20=180

x=120

Answer:

120

Step-by-step explanation:

two lines are parallel

20+40+x=180

x=180-60

x=120

Answer:

n = 8, -6

Step-by-step explanation:

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