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irga5000 [103]
3 years ago
13

A jewlery supply shop buys silver chains from a manufacturer for c dollars each, and then sells the chains at a 57% markup

Mathematics
1 answer:
kirza4 [7]3 years ago
4 0

11. 57% = 0.57

12.  retail price = c + (0.57c)

13.  retail price = 45 + (0.57 x 45)

retail price = 45 + 25.65

retail price = $70.65

14. 57% was added to the original price of the chain which is $25.65

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90 points for question
Lesechka [4]

Answer:

x=10

Step-by-step explanation:

so your given an angle, 110, and another with an equation, 8x+30, which happens to be vertical to 110 degree angle meaning they are equal, so they both are equal to 110 now how do you solve for x? you simply reverse the equation that x is in, so you subtract 110-30=80, then divide by 8 giving you 10, so x=10.

3 0
2 years ago
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Derivative of the following cos(x^{2} y)=y^{2}
MatroZZZ [7]

Answer:

\cos( {x}^{2}y )  =  {y}^{2}  \\  \frac{d( \cos( {x}^{2}y) ) }{dx}  =  \frac{d( {y}^{2}) }{dx}  \\ (2xy +  {x}^{2} \frac{dy}{dx}  ).( -  \sin( {x}^{2} y) ) = 2y \frac{dy}{dx}  \\   \frac{- 2xy \sin( {x}^{2}y )   -  {x}^{2}  \sin( {x}^{2} y) }{2y}  =  \frac{dy}{dx}  \\

3 0
2 years ago
Write an equation for the sentence. The product of some number and five is added to seven to give a total of twenty-three.
neonofarm [45]

Hello!

We could write this equation as shown below.

5x+7=23

As you can see, your answer will be D) 5x+7=23

I hope this helps!

5 0
3 years ago
For each of the following claims, fill in the blanks in the provided hypotheses with inequalities. If your answer is "less than,
Leni [432]

Answer:

a) H0: μ=>3; Ha: μ<3

b) H0: μ<=110; Ha: μ>110

c) H0: μ=2.1; Ha: μ/=2.1

d) H0: μ=>70; Ha: μ<70

Step-by-step explanation:

The claims are usually expressed in the alternative hypothesis, for which we evaluate the evidence, usually sample statistics.

(a) Theory to be tested: The average number of children per household in the United States is less than 3.

In this case, the claim is that the mean is below 3 children per household. The null hypothesis will state then that the average number of children is 3 or more.

H0: μ=>3; Ha: μ<3

(b) Theory to be tested: The average weight of TAMU students is greater than 110 pounds.

The alternative hypothesis represents the claim that the mean is greater than 110. The null hypothesis, then will state that the mean is equal or less than 110.

H0: μ<=110; Ha: μ>110

(c) Theory to be tested: The average diameter of Saguaro cacti is not 2.1 feet.

In this case, the alternative hypothesis is represented by an unequal sign (the average diameter can be higher or lower). Then, the null hypothesis will state that the average diameter is equal to 2.1.

H0: μ=2.1; Ha: μ/=2.1

(d) Theory to be tested: In Belarus (former member of the Soviet Union, located near Chernobyl), the average life span is under 70 years.

The alternative hypothesis states that the average life span is under 70 years, so the null hypothesis will state that it is equal or more than 70 years.

H0: μ=>70; Ha: μ<70

3 0
2 years ago
Which expression is NOT equivalent to 8 times −5 and 1/4?<br><br> Drag this expression to the box.
timurjin [86]
The correct answer is 8×(-6) - 8×3/4.

Simplifying this problem is the same as the problem 8× - 6 3/4, not 8× -5 1/4.
6 0
3 years ago
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