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>
4. Change the sign of the integer
Answer:
x ≈ 50.76
Step-by-step explanation:
Sin72º = 
200Sin72º
x ≈ 50.76
Hope this is helpful :')
Answer:
-4²
Step-by-step explanation: