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3 years ago

9 less than twice a number is 13. What is the number?

Mathematics

2 answers:

MissTica3 years ago

8 0

Answer:

x = 11.

Step-by-step explanation:

9 less than twice a number is the same thing as twice a number minus 9. Let's say that the number is x.

2x - 9 = 13

2x = 22

x = 11

Hope this helps!

Gnom [1K]3 years ago

7 0

Answer:

Step-by-step explanation:

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(3ab+2c)^3 what is the answer

svet-max [94.6K]

Answer:

$=27a^3b^3+54a^2b^2c+36abc^2+8c^3$

Step-by-step explanation:

$(3ab+2c)^3$

$=(3ab+2c)$ × $(3ab+2c)$ ×

$=(3ab+2c)(9a^2b^2+12abc+4c^2)$

$=(3ab)(9a^2b^2)+(3ab)(12abc)+(3ab)(4c^2)+(2c)(9a^2b^2)+(2c)(12abc)+(2c)(4c^2)$

$=27a^3b^3+36a^2b^2c+12abc^2+18a^2b^2c+24abc^2+8c^3$

$=27a^3b^3+54a^2b^2c+36abc^2+8c^3$

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2 years ago

If y varies directly with x, find the value of x when y is 180 and k is 15.

BabaBlast [244]

A

Divide 180 over 15

6 0

3 years ago

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A shop has determined that the number of bottles of water they sell on a summer day is a function of the day’s high temperature,

Alik [6]

Answer:

$T=t+94$

Where T is the hight temperature and t is the day

Explanation:

The table shows that every day the High temperature, T (degrees F) increases 1 unit.

Then, this is a linear function with slope = 1ºF / day.

You can use the point-slope equation to determine the function of the high temperature:

Point-slope equation:

$y-y_1=m(x-x_1)$

Choose any point from the table and m = 1. I will use the first point (1,95)

m = 1

x₁ = 1

y₁ = 95

Substitute:

$y-95=1(x-1)\\\\y=x-1+95\\\\y=x+94$

Make the variables y = T, and x = t:

$T=t+94$

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3 years ago

If a small plain pizza should bake for 12 minutes, how long should you bake a small pepperoni pizza

shtirl [24]

Answer:

This question needs more information to answer. Likewise if it was a riddle then the question might be a trick. If you have forgot to add any additional information I advise you to fix it right away then reupload the question.

Step-by-step explanation:

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3 years ago

GIVING BRANLIEST!!!!!! 1O POINTS Tiffany is taking a 42-question test worth 100 points. The test includes two-point and four-poi

luda_lava [24]

Answer:

2t + 4f = 100

t+f =42

Step-by-step explanation:

t= two point questions

f =four point questions

2t + 4f = 100

t+f =42

there are 34 two point questions and 8 four point questions

to solve multiply the second equation by -2

-2t -2f = -84

add this to 2t +4f = 100

2t + 4f = 100

-2t -2f = -84

-----------------------

2f = 16

divide by 2

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subtract 8

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3 years ago

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