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Bad White [126]
3 years ago
8

Simpligy the expression 7(x+7)-3(x+3)

Mathematics
1 answer:
Irina18 [472]3 years ago
6 0

We will use the distributive property, where a(b+c) = ab+ac and a(b-c) = ab-ac.

7(x+7)-3(x+3)

=7x+49-(3x+9)

=4x+40

Therefore, the simplified expression is 4x+40.

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Tyler’s brother works in a shoe store. The store was selling a pair of shoes for $80. They now are on sale for $50. What is the
DerKrebs [107]

Answer:

i think its 37.5%. let me know if its correct or not

Step-by-step explanation:

4 0
2 years ago
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Simplify. <br> (–5q^2p)^3
mr_godi [17]

Answer:

Step-by-step explanation:

(a*b)^{n} = a^{n}*b^{n}\\\\(a^{n})^{m} = a^{m*n}\\\\ (-5q^{2}*p)^{3}= (-5)^{3}*q^{2*3}*p^{3}\\\\= -125q^{6}p^{3}

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3 years ago
The quantity demanded x for a certain brand of MP3 players is 100 units when the unit price p is set at $80. The quantity demand
Cerrena [4.2K]

Answer:p = (2100 - x)/25

Step-by-step explanation:

According to the law of demand, when the price,p of the brand of MP3 players is is high, the quantity,x of the brand of MP3 players demanded would be low and when the price,p of the brand of MP3 players is is low, the quantity,x of the brand of MP3 players demanded would be high.

To derive the demand equation, we would apply the slope intercept form of equation which is expressed as

y = mx + c

Where

m = slope

c = intercept

The slope, m would be

(y2 - y1)/(x2 - x1)

Slope = (1100 - 100)/(40 - 80) = 1000/-40

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To find the y intercept, we would substitute m = - 25, y = 1100 and x = 40 into y = mx + c. It becomes

1100 = - 25 × 40 + c

1100 = - 1000 + c

c = 1100 + 1000 = 2100

y = - 25x + 2100

Therefore, the demand equation is

x = - 25p + 2100

25p = 2100 - x

p = (2100 - x)/25

4 0
3 years ago
62.4 is 48% of what number ?
Veronika [31]

Answer:

130

Step-by-step explanation:

62.4 divided by 48 to get the 1 percent of the number, then multiply by 100 to get the number.

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Write the quadratic equation whose roots are −2 and 6, and whose leading coefficient is 3
MaRussiya [10]

Answer:

3(x + 2)(x - 6) = 0

Step-by-step explanation:

We see that if x + 2 = o then x= -2

and if x - 6 = 0,  x = 6.

4 0
3 years ago
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