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3 years ago

13

When 7 times a number is decreased by 8, the answer is the same as when 3 times the number is increased by 4. find the number. j

. grossman?

1 answer:

GarryVolchara [31]3 years ago

5 0

Let unknown number be x.

Given,

7x - 8 = 3x + 4

4x = 12

x = 3

Hence, the number is 3.

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(PLEASE ANSWER QUICK) Which prisms do Sophia use exactly 18 unit cubes to build? Choose all the correct answers. The options are

creativ13 [48]

Last ones in each row

Step-by-step explanation:

count which figure has 18 cubes

First has 12

2nd one has 24

3rd one has 27

4th one has 18

5th one has 18

6 0

2 years ago

Evaluate the definite integral. <br> 1 x4(1 + 2x5)5 dx.

Nata [24]

Answer:

Step-by-step explanation:

Given the definite integral $\int\limits {\dfrac{x^4}{(1-2x^5)^5} } \, dx$ , we to evaluate it. Using integration by substitution method.

Let u = 1-2x⁵ ...1

du/dx = -10x⁴

dx = du/-10x⁴.... 2

Substitute equation 1 and 2 into the integral function and evaluate the resulting integral as shown;

$= \int\limits {\dfrac{x^4}{u^5} } \, \dfrac{du}{-10x^4}$

$= \dfrac{-1}{10} \int\limits {\dfrac{du}{u^5} } \\\\= \dfrac{-1}{10} \int\limits {{u^{-5}du } \\= \dfrac{-1}{10} [{\frac{u^{-5+1}}{-5+1}] \\\\= \dfrac{-1}{10} ({\frac{u^{-4}}{-4})\\\\$

$= \dfrac{u^{-4}}{40} \\\\\\= \dfrac{1}{40u^4} +C$

substitute u = 1-2x⁵ into the result

$= \dfrac{1}{40(1-2x^5)^4} +C$

Hence $\int\limits {\dfrac{x^4}{(1-2x^5)^5} } \, dx$ $= \dfrac{1}{40(1-2x^5)^4} +C$

5 0

3 years ago

Heather paid $1,493.30 for a computer. If the price paid includes a 9% sales tax, which of the following equations can be used t

aliina [53]

A because x is the original price, so you multiply by the tax (9%) which would convert to 1.09 which you would multiply to the x

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3 years ago

A door opening is 2 meters high. If there is a 39 centimeter gap between the top of Casey's head and the top of the door opening

sammy [17]

You should find that Casey is 161 cm tall.

8 0

3 years ago

Help<br> do odds except 17

Ksju [112]

Answer:

19. 1 do 4^5 which is 1024 then do 1024^0 which is 1

21. 0.000064 do 5^-2 which is 0.04 then do 0.04^3 which is 0.000064

23. 2.33 do 9^4 which is 6561 then do 6561^-2 which is 2.32305731 so you round it to 2.33

btw you should talk to me more

8 0

3 years ago