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Marizza181 [45]
4 years ago
11

Julia has $80. She wants to purchase a nail paint set for $16 ans earrings. She spends the rest of the money on earrings. Each p

air of earrings cost $8. Write an inequality for the number of pairs of earrings she can purchase?
Mathematics
2 answers:
jenyasd209 [6]4 years ago
5 0
<span>Julies has 80 dollars
=> She wants to purchase $16 nail paint set
and spent the rest of her money on earrings which costs 8 dollars.
Write and inequality:
Let E be the number of earing she bought.
=> 16 + 8E = 80
=>  8E = 80 – 16
=> 8E = 64
=> 8E / 8 = 64 / 8
=> E = 8
Let’s check our answer
=> 16 + 8(8) <u>></u> 80
=> 16 + 68 <u>> </u>80<u>
</u>=> 80 <u>> </u>80


</span>



Strike441 [17]4 years ago
3 0
So, after the nail set is bought, she will have 80-16 left, that is 64. If each pair of earrings costs 8 dollars, then she can buy 64/8 =8: She can buy 8 pairs of earrings.

I don't see how you can make an "inequality" with this.

If the question is interpreted that she doesn't spend all her money, then we could say, if we must that if y=number of earrings she can buy then

y≤8
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Answer:

.95

Step-by-step explanation:

Using pythagorean theroem to calculate the missing side it's 35

35/37 = .94594597

or sin of angle a 71.07536 = .94594597

8 0
3 years ago
5.
irina [24]

Answer:

160 m²

384 m²

Step-by-step explanation:

The area of a trapezium is given by :

A = 1/2(a + b)h

h = height ; a and b = lengths

From the diagram :

A = 1/2(12 + 20)10

A = 1/2(32)10

A = 16 * 10

A = 160 m²

2.)

Area of parallelogram = base * height

Base = 24 ; h = 16

A = 24 * 16

A = 384 m²

7 0
3 years ago
Dean Halverson recently read that full-time college students study 20 hours each week. She decides to do a study at her universi
romanna [79]

Answer: The p-value is 0.154.

Step-by-step explanation:

Since we have given that

We claim that

Null hypothesis :

H_0:\mu=20

Alternate hypothesis :

H_1:\mu

Population mean = 20 hours

Sample mean = 18.5 hours

Sample standard deviation = 4.3 hours

Sample size n = 35

So, test statistic would be

z=\dfrac{\bar{X}-\mu}{\dfrac{\sigma}{\sqrt{n}}}\\\\z=\dfrac{18.5-20}{\dfrac{4.3}{\sqrt{35}}}\\\\z=\dfrac{-1.5}{0.726}\\\\z=-2.066

So, the  p value would be 0.154.

Hence, the p-value is 0.154.

4 0
3 years ago
What is the equation of a line that has a slope of 0 and passes through (5, −2)?
kumpel [21]

y=-2

Step-by-step explanation:

if line has zero slope (b) it means that b is undefined.

if x=0 y=-2 because line has no slope. so b=-2

y=-2

4 0
3 years ago
Chase is building a birdhouse in the shape of a regular polygon. He knows that the measure of the interior angle is twice the me
mel-nik [20]

Answer:

The perimeter of the base of the birdhouse is 36 units

Step-by-step explanation:

<u><em>The complete question is</em></u>

Chase is building a birdhouse in the shape of a regular polygon. He knows that the measure of the interior angle is twice the measure of the exterior angle and the length of a diagonal that passes through the center is 12. What is the perimeter of the base of the birdhouse?

step 1

Find the measure of the interior angle

Let

x ---> the measure of the interior angle

y ---> the measure of the exterior angle

Remember that

the sum of the interior and exterior angle in any polygon is equal to 180 degrees

so

x+y=180^o ----> equation A

we have that

the measure of the interior angle is twice the measure of the exterior angle

so

x=2y ----> equation B

substitute equation B in equation A

2y+y=180

y=60^o

so

x=120^o

That means-----> The figure is a regular hexagon

step 2

Remember that

The length of the diagonal that passes through the center of the hexagon is equal to two times the length of the regular hexagon

Let

b ----> the length side of the hexagon

so

b=12/2=6\ units

The perimeter of the hexagon is given by the formula

P=6b

substitute

P=6(6)=36\ units

3 0
3 years ago
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