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Salsk061 [2.6K]
3 years ago
5

A buyer purchases 75 yards of material for $120. Then an additional 90 yards are ordered. What is the additional cost?

Mathematics
1 answer:
dezoksy [38]3 years ago
4 0

Answer:

$128

Step-by-step explanation:

1. We need to find how much 1 yard of material cost.

If needed, use a calculator*

120/75=1.6

2. Now we need to know how much 15 yards of material cost.

1.6 times 15=24

3. The buyer ordered an additional 90 yards. If we know how much 75 yards cost, and 15 yards, all you have to do is...

120+24=144

90 yards=$144

4. The additional cost is $144

(Note: the total cost would be $264 (120+144=264))

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y - 5 = 3(x - 1)

y - 5 = 3x - 3

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The standard form is 3x - y = -2.

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3z^2-4z+11 -(12z^2+2z-11 find the difference . polynomials functions
Brrunno [24]

Answer:

−135z

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−2z
The 2 is representing Square

Step-by-step explanation:

(3z)
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Expand (3z)

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3

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Calculate 3 to the power of 2 and get 9.

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Expand (12z)

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2 years ago
Find f(3) for f(x)=−5x−2<br><br> A. -10<br><br> B. -15<br><br><br> C. 13<br><br><br> D. -17
Travka [436]

Answer:

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General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Algebra I</u>

  • Function Notation

Step-by-step explanation:

<u>Step 1: Define</u>

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<u>Step 2: Evaluate</u>

  1. Substitute in <em>x</em>:                    f(3) = -5(3) - 2
  2. Multiply:                               f(3) = -15 - 2
  3. Subtract:                              f(3) = -17
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