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nadya68 [22]
3 years ago
15

A clock on sale for $215 was regularly priced at $565 find the percent of discount

Mathematics
1 answer:
Naya [18.7K]3 years ago
3 0
The percent of discount is 38%
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Select the two values of x that are roots of this equation.<br> 2x+11x+15= 0
Amiraneli [1.4K]

Answer:

The roots of the equation are x=-3 and x=-2.5

Step-by-step explanation:

<u><em>The correct quadratic equation is</em></u>

2x^2+11x+15=0

we know that

The formula to solve a quadratic equation of the form

ax^{2} +bx+c=0 is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

2x^{2} +11x+15=0  

so

a=2\\b=11\\c=15

substitute in the formula

x=\frac{-11(+/-)\sqrt{11^{2}-4(2)(15)}} {2(2)}

x=\frac{-11(+/-)\sqrt{121-120}} {4}

x=\frac{-11(+/-)\sqrt{1}} {4}

x=\frac{-11(+/-)1} {4}

x_1=\frac{-11(+)1}{4}=-2.5

x_2=\frac{-11(-)1}{4}=-3

therefore

The roots of the equation are x=-3 and x=-2.5

5 0
3 years ago
Ace Bike Rentals rents bikes for $28 per day Renters can keep the bike for 8 hours Bart’s Bikes rents bikes for $30 per day Rent
yanalaym [24]

Answer:

Bart’s bikes ll  .50

Step-by-step explanation:


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3 years ago
Write Y=4/3x-4 in slope intercept form
sergij07 [2.7K]

Answer:

Y=4/3x-4

Step-by-step explanation:

You have it in slope intercept form =)

7 0
3 years ago
What is the value of the x in this figure?
azamat
I believe its 45 because a right angle equals 90 degrees and if you multiply 45 and 2, it'll give you a right angle(90 degrees)
4 0
3 years ago
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This months rainfall is 30% less than last months total of 3.5 inches.
Afina-wow [57]

Answer:

1.05

Step-by-step explanation:

3.5x.30=1.05

6 0
3 years ago
Read 2 more answers
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