Answer:
84
Step-by-step explanation:
We can set up a proportion using fractions.

Now, let's cross multiply by multiplying 12 and 28 then dividing by 4.

Hope this helped!
Answer:
the answer i estmatied was 43 real answer is 43.1
Step-by-step explanation:
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Thus Lisa spent 135 $ .
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Answer:
y = 9
Step-by-step explanation:
Using the sine ratio in the right triangle and the exact value
sin45° = 
sin45° =
= 
Multiply both sides by y
y × sin45° = 9, that is
y ×
= 9
Multiply both sides by 
y = 9
The value of the expression 13(a×b + a²) + 4 is 1434 after plugging a = 5 and b = - 3.
<h3>What is an expression?</h3>
It is defined as the combination of constants and variables with mathematical operators.
The expression is:
= 13(a×b + a²) + 4
Plug a = 5
b = -3
= 13(5×(-3) + 5a²) + 4
= 13(-15 + 5(25)) + 4
= 13(-15 + 125) + 4
The arithmetic operation can be defined as the operation in which we do the addition of numbers, subtraction, multiplication, and division. It has basic four operators that is +, -, ×, and ÷.
= 13(110) + 4
= 1430 + 4
= 1434
Thus, the value of the expression 13(a×b + a²) + 4 is 1434 after plugging a = 5 and b = - 3.
Learn more about the expression here:
brainly.com/question/14083225
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