Start with

Divide both sides by -3

If the absolute value of a number is 4, that number can either be 4 or -4: we have the two solutions


2a+1b=27.50
4a+2b=59.50
Multiply first equation by -4 and the second by 2 so you can drop off the a values then add the equations together. Then solve for b. You should get b=6.
Then plug b into one of the original equations and solve for a and you should get 10.75
So a plate of spaghetti is $10.75 and a salad is $6.
<em><u>Please mark brainliest!</u></em>
When a straight line is given the form:

m is the gradient. It shows how the value of y changes for an increase of x by 1.
So, in this case, the gradient is
4
Answer:
0.253, hope this helps
Step-by-step explanation:
1:9 is the ratio
You can check this by converting the feet to inches and dividing the greatest number by the smaller number.