the answer is A :)))))))))))))))))
Answer: Mary's backpack was a better buy.
Step-by-step explanation:
First, you figure out the cost of Mary's backpack. To do this, you find the amount taken off the original price by doing 65 x 25%.
65 x 25% = 16.25. This is the price deducted form the original. Therefore the new price is $48.75 because $65(original)- $16.25(amount taken off original)= $48.75.
Now onto Roberto. First, you find the price taken off by doing 75 x 30%. This gets you $22. 50.
75 x 30%= 22.5
Next, you deduct the original from the amount taken off.
75-22.5= $52.50
Since 48.75 is less than 52.50, Mary's backpack was a better buy.
Answer:
C. -3
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
- Multiplication Property of Equality
- Division Property of Equality
- Addition Property of Equality
- Subtraction Property of Equality<u>
</u>
Step-by-step explanation:
<u>Step 1: Define</u>
-7x + 6 = 27
<u>Step 2: Solve for </u><em><u>x</u></em>
- [Subtraction Property of Equality] Subtract 6 on both sides: -7x = 21
- [Division Property of Equality] Divide -7 on both sides: x = -3
Answer:
Yamato's Here!
Step-by-step explanation:
−
10 < x < 4
Hope this helps! (-o- )/
Here two areas are equal: That of the square equals that of the rectangle.
Let s represent the side length of the square. Then the area of the square is s^2.
The length of the rect. is 2s+5, and the width of the rect. is s-6.
"<span>A square and rectangle have equal areas."
</span>
Thus, s^2 = (2s+5)(s-6), or s^2 = 2s^2 - 12s + 5s - 30
Simplifying, 0 = s^2 - 7s - 30. This factors to 0 = (s-10)(s+3).
Thus, s may be either 10 or -3. Lengths are not negative, so omit the -3. The side of the square, s, is 10 units.
Then the width of the rect. is s-6 = 4, and the length of the rect. is 2s+5, or 2(10)+5, or 25.