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Finger [1]
3 years ago
11

Mona stopped at a gas station where the price per gallon was $2.80. She spent $14 to fill up her car. What equation would repres

ent how much gas Mona purchased? How many gallons of gas did Mona purchase? If Mona’s car gets 20 miles per gallon, how many miles did she drive since the last time she filled up her tank?
Mathematics
2 answers:
alina1380 [7]3 years ago
8 0

Answer:

A.) 5 x 2.80 B.) 100

Step-by-step explanation:

14/2.80=5 which is how many gallons

5 x 20 = 100 for the miles

Helen [10]3 years ago
3 0

Answer:

1. A

2. A

3. D

Step-by-step explanation:

Stay safe❤️

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The number of smaller triangles along one side of the larger triangle is the square root of the total number of triangles. The perimeter of the large triangle is ...
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3 years ago
Use a matrix to solve the system:
Romashka-Z-Leto [24]

Answer:

(2.83 , 1 , 4)

Step-by-step explanation:

2x+2y-z=4\\4x-2y-2z=2\\3x+3y-4z=-4\\

Rewrite these equations in matrix form

\left[\begin{array}{ccc}2&2&-1\\4&-2&-2\\3&3&-4\end{array}\right] \left[\begin{array}{ccc}x\\y\\z\end{array}\right]=\left[\begin{array}{ccc}4\\2\\-4\end{array}\right] \\

we can write it like this,

AX=B\\X=A^{-1}B

so to solve it we need to take the inverse of the 3 x 3 matrix A then multiply it by B.

We get the inverse of matrix A,

A^{-1}=\left[\begin{array}{ccc}7/15&1/6&-1/5\\1/3&-1/6&0\\3/5&0&-2/5\end{array}\right]  \\

now multiply the matrix with B

X=A^{-1}B\\\\\left[\begin{array}{ccc}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}7/15&1/6&-1/5\\1/3&-1/6&0\\3/5&0&-2/5\end{array}\right]\left[\begin{array}{ccc}4\\2\\-4\end{array}\right] \\\\\\\left[\begin{array}{ccc}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}2.83\\1\\4\end{array}\right] \\

4 0
3 years ago
PLEASE HELP ME PLEASE
andreev551 [17]
There is no solution is the answer. I had this in one of my math tests so I'm positive it's correct :D 
4 0
3 years ago
If the sales tax rate is 7.6%, how much sales tax will you pay on a $330 item?
stira [4]

Answer:

If the sales tax rate is 7.6%, how much sales tax will you pay on a $330 item?

Step-by-step explanation:

If the sales tax rate is 7.6%, how much sales tax will you pay on a $330 item?

4 0
3 years ago
Read 2 more answers
Geometry... Please help and I'll mark brainliest if I can. Triangle proofs & reasons
cluponka [151]

Answer:

I think you just figure out what two points make the area? i dont know tho

Step-by-step explanation:

8 0
3 years ago
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