All categories

3 years ago

If x = 4y + 21y and y = 14 + 5, what is 3x × 7? No need to show your work.

Mathematics

2 answers:

podryga [215]3 years ago

7 0

y = 19

x = 4(19) + 21(19) = 76 + 399 = 475

3(475) × 7

1425 × 7

9975 <--- answer.

Hope this helped!

Nate

Brut [27]3 years ago

3 0

Answer:

the answer is 39

Step-by-step explanation:

You might be interested in

HELPPP!!!!!!!! What is the value of f(6)

castortr0y [4]

Answer:

f(6) = 35 × 6 - 175 = 35

6 0

2 years ago

Helppppppp pllzzzzzzz

torisob [31]

I can't answer this because I don't know what she was starting with

5 0

3 years ago

What is the area of a sector with a central angle of 108 degrees and a diameter of 21.2 cm?

Rasek [7]

Answer:

$105.84\ cm^2$

Step-by-step explanation:

step 1

Find the area of the circle

The area of the circle is

$A=\pi r^{2}$

we have

$r=21.2/2=10.6\ cm$ ----> the radius is half the diameter

substitute

$A=\pi (10.6)^{2}$

$A=112.36\pi\ cm^2$

step 2

Find the area of a sector

Remember that

The area of the circle subtends a central angle of 360 degrees

using proportion

Find out the area of a sector with a central angle of 108 degrees

$\frac{112.36\pi}{360^o}=\frac{x}{108^o}\\\\x=112.36\pi(108)/360\\\\x=33.708\pi\ cm^2$

assume

$\pi=3.14$

substitute

$33.708(3.14)=105.84\ cm^2$

7 0

3 years ago

Do you know how to do this?

Vaselesa [24]

6.45$ for 3 divide 15.05

4 0

3 years ago

Read 2 more answers

A student is trying to solve the system of two equations given below:

levacccp [35]

Answer: B: (y + z = 6) × -5

Step-by-step explanation:

if you multiply 'y' by -5 it turns into -5y. Therefore when you add -5y and 5y together, you get 0y which is what you want when eliminating the y-term.

8 0

1 year ago