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3 years ago

What expressions are equal to (5x-7)-(3x-4)

Mathematics

1 answer:

astra-53 [7]3 years ago

8 0

Answer:

2x-3

Step-by-step explanation:

1) distribute the negative to the second parentheses

(5x-7) -3x+4

2) combine like terms

2x-3

Hope this helps!

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ExtremeBDS [4]

Answer:

Length: 20 or 40 feet

Width: 40 or 20 feet

Step-by-step explanation:

Area = 800 = length*width = x*(60-x)= 60x - x^2

- x^2 + 60x - 800 = 0

x = 20

Or x = 40

So length can be either 20 feet or 40 feet and width can be 40 (60-20) or 20 (60-40)

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

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Which number is a factor of 22 but not multiple of 2 ?

Masja [62]

Answer:

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Step-by-step explanation:

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3 years ago

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What's the common factors for 39 and 65?

Ivenika [448]

Factors of 39: 1, 3, 13, and 39.
Factors of 65: 1, 5, 13, and 65.

The common factors for 39 and 65 are 1 and 13.
The greatest common factor is 13.

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3 years ago

Jackie's restaurant bill was $23. 50, and the tax was 8%. Jackie left a 20% tip on the post-tax bill. How much was the tip Jacki

Ksju [112]

well, the subtotal or pre-tax bill is $23.50, now let's add the 8% tax and

$\begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{8\% of 23.50}}{\left( \cfrac{8}{100} \right)23.50}\implies 1.88$

so the post-tax bill is 23.50 + 1.88 = 25.38, and Jackie's tip is 20% of that

$\begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{20\% of 25.38}}{\left( \cfrac{20}{100} \right)25.38}\implies 5.076\qquad \approx 5.08$

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2 years ago