4 years ago

Will give brainlist!!!!!! need this asap

Mathematics

1 answer:

Nana76 [90]4 years ago

4 0

$d. \: 30 \: for \: 6 \: subs$

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You must use the substitution method. 3x+2y=11 <br> y=5x-1

valina [46]

Plug in y=5x-1 for y in 3x+2y=11

3x+2(5x-1)=11
3x+10x-2=11
13x=13
x=1

plug x=1 to y=5x-1 to find y

y=5(1)-1
y=5-1
y=4

ANSWER: x=1 and y=4 which is (1,4) as an ordered pair

5 0

4 years ago

A rectangular field is twelve times as long as it is wide. If the perimeter of the field is 1690 feet, what are the dimensions o

lawyer [7]

Answer:

The width of the field is 65 feet.

The length of the field is 780 feet.

6 0

4 years ago

What is the surface area of a sphere with a diameter of 12 centimeters ?

nasty-shy [4]

Answer:

$A=452.39\ cm^2$

Step-by-step explanation:

The formula to calculate the surface area of a sphere is the following:

$A=4\pi r^2$

Where A is the area of the sphere and r is the radius of the sphere.

In this case we know that the diameter d of the sphere is:

$d = 12\ cm$

The diameter is:

$d = 2r$ .

Thus

$r = \frac{d}{2}\\\\r = \frac{12}{2}\\\\r=6\ cm$

Then the surface area of the sphere is:

$A=4\pi (6)^2\\\\A = 144\pi\ cm^2\\\\A=452.39\ cm^2$

7 0

3 years ago

Read 2 more answers

Help NO LINKS PLZ thx u.

andrey2020 [161]

Answer:

5, -5

Step-by-step explanation:

well 5-5 is 0 so that's it

:))))

6 0

3 years ago

Read 2 more answers

A farmer was counting his cows and chickens. He counted 13 heads and 36 legs. How many cows does he have?

melomori [17]

<span>Cows (C)→ 4 legs
Chickens (c) → 2 legs
C+c=13 |×4
4C+2c=36

4C+4c=52
4C+2c=36
--------------- (-)
2c=16
c=8 chickens

C=13-8
C=5 cows
</span>

3 0

3 years ago