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egoroff_w [7]
3 years ago
15

Which is the best first step when solving the following system of equations? x + y = 3. 4 x minus y = 7. Multiply the first equa

tion by 4. Add the first equation to the second equation. Multiply the second equation by Negative 1. Subtract the second equation from the first equation.
Mathematics
2 answers:
Gala2k [10]3 years ago
8 0

Answer:

The other guy is wrong its c

Step-by-step explanation:

Kryger [21]3 years ago
6 0

Answer:

Multiply the first equation by 4.

Step-by-step explanation:

4(x+y=3) which gives

4x+4y=12

and

4x-y=7

Then subtract the two equations and the x variable will be eliminated.

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10 in.
Sati [7]

Answer: (1)

Step-by-step explanation:

6 0
2 years ago
A company sells bath oils contained in spherical, water-soluble pods. The circumference of each spherical pod is 37.68 millimete
77julia77 [94]

Hello!

First of all, to find the volume we will want to find the radius. First let's divide our circumference by pi.

37.68/3.14=12

We find half of this for the radius.

12/2=6

Now we use the formula V=\frac{4}{3} \pi r^{3}. We will solve below.

V=\frac{4}{3} \pi (6^{3} )

V=\frac{4}{3} \pi(216)

V\approx \boxed {904.32}

Therefore, our answer is about 904.32 ml³.

I hope this helps!

6 0
4 years ago
A group walked 3/8 mile in 1/5 hour. Which is the groups walking speed in miles per hour
gogolik [260]

Answer:

The groups walking speed is 1\frac{7}{8}\frac{miles}{hour}  or 1.875\frac{miles}{hour}

Step-by-step explanation:

we know that

To find the speed divide the distance by the time

so

\frac{(3/8)}{(1/5)}=\frac{15}{8}\frac{miles}{hour}

Convert to mixed number

\frac{15}{8}=\frac{8}{8}+\frac{7}{8}=1\frac{7}{8}\frac{miles}{hour}

6 0
4 years ago
What’s the answer to this
Aleksandr [31]

Answer B

Step-by-step explanation:

2x+1+14

6 0
3 years ago
Read 2 more answers
PLEASE HELP 33 POINTS AND I WILL MARK BRAINLIEST!!!!!!!! THANKS!!!!!!!!!!!
zysi [14]

(a) Volume of any Pyramid =   \frac{1}{3} * (Base-Area)*height = \frac{1}{3} *220.22*9 = 660.66 cubic units

(b) Sarah doesn't have to go through all the hard work as the smaller pyramid has a ratio of 2:3 to the bigger pyramid, so we get the equation, to help us solve it.

660.66 = \frac{2}{3} *(Area-of-larger-pyramid)

Hope that helps!

3 0
2 years ago
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