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SIZIF [17.4K]
3 years ago
8

What is the value of f(X)=3x-12 for X=9

Mathematics
1 answer:
Phantasy [73]3 years ago
8 0
F(X)=3x-12 Substitute 9 for x. f (9)=3 (9) -12 Multiply 9 by 3. F (9)= 27 -12 Subtract Final Answer: 15
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algerbra. com The ninth graders at a high school are raising money by selling T-shirts and baseball caps. The number of T-shirts
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Answer:

36 T-shirts and 12 Baseball Caps

Step-by-step explanation:

GIVEN: The ninth graders at a high school are raising money by selling T-shirts and baseball caps. The number of T-shirts sold was three times the number of caps. The profit they received for each T-shirt sold was \$5.00, and the profit on each cap was \$2.50.

TO FIND: If the students made a total profit of \$210, how many T-shirts and how many caps were sold.

SOLUTION:

Let the total number of T-shirts sold are =\text{t}

Let the total number of Baseball Caps sold are =\text{b}

Profit received on each T-shirt =\$5.00

Profit received on each Baseball Caps =\$2.50

Total profit received on T-shirts =\$5.00\text{t}

Total profit received on Baseball Caps =\$2.50\text{b}

5\text{t}+2.5\text{b}=210

Also,

The number of T-shirts sold was three times the number of caps.

        \text{t}=3\text{b}

putting in equation,

       5\times\text{3b}+2.5\text{b}=210

       17.5\text{b}=210

       \text{b}=12

       \text{t}=3\times12

       \text{t}=36

Hence total 36 t-shirts and 12 baseball Caps were sold.

     

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