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KonstantinChe [14]
3 years ago
9

A worker wants to save enough money to buy new

Mathematics
1 answer:
allochka39001 [22]3 years ago
3 0

Answer:

The least amount of numbers that he can work at his job to have enough for the headphones he wants is 17 hours.

Step-by-step explanation:

To find the number of hours you could divide the cost of the headphones by the amount he earns each hour so you would do $119/ 7 to get 17 and then you could check your answer with multiplication by multiplying 7 * 17 to get 119 which shows that he has to work at least 17 hours to get the headphones he wants.

$119 / 7 = 17

17 * 7 = 119

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-2x+15y=24 2x+9y=24, what is the value of x and y
kaheart [24]
Eliminate x's by adding te 2 equations

add them

-2x+15y=24
<u>2x+9y=24 +</u>
0x+24y=48

24y=48
divide both sides by 24
y=2

sub back

2x+9y=24
2x+9(2)=24
2x+18=24
minus 18 both sides
2x=6
divide 2
x=3


x=3
y=2

(x,y)
(3,2)
4 0
3 years ago
Aubrey is making cone-shaped hats for a birthday party. She mistakenly thinks that she will need about 104 square inches of pape
jenyasd209 [6]

Answer:

C. About 75 in²; Aubrey found the surface area of the cone and included the base.

Step-by-step explanation:

In the questions above we were given the following:

Cone with

Diameter(D) = 6 inches

Slant height (l) = 8 inches.

Aubrey made an error in her calculation.

She found the Total Surface area of the cone using the formula:

Total Surface Area of a cone = πrl + πr²

= πr(l + r)

The Total surface area of a cone is the calculated as Sum of the curved surface area of a cone and the base of the cone.

Where:

Curved surface area of the cone is calculated as = πrl

Base of a cone is calculated as = πr²

Where r = radius of the cone

l = slant height of the cone

In the question, we were given

slant height(l) = 8 inches.

radius = Diameter ÷ 2 = 6÷2 = 3 inches.

Using π = 3.14

Surface area = 3.14 × 3(8+3)

= 9.42 × 11

Surface area = 103.62 in²

Approximately to the nearest inch = 104 in² or 104 square inches.

But this answer is WRONG.

The RIGHT FORMULA Aubrey should have used is

Curved Surface Area or the Lateral Area of a Cone = πrL

slant height(l) = 8 inches.

radius = Diameter ÷ 2 = 6÷2 = 3 inches.

Using π = 3.14

Curved Surface Area of a Cone = πrL

= 3.14 × 3 inches × 8 inches

= 75.36 square inches or 75.36in²

Approximately to the nearest inch = 75 square inches or 75 in².

This is the correct answer.

The error Aubrey made was she calculated the Total surface area of the cone which includes the base of the cone instead of calculating the curved surface area of the cone only.

Hence, from the above calculation , we can see that Option C "About 75 in²; Aubrey found the surface area of the cone and included the base" is the correct option.

5 0
3 years ago
How do you Order the numbers from least to greatest. -7 , -7.75, 1/2, 75%
Serggg [28]

Answer:

-7.75, -7, 1/2, 75%

Hope this helps ☝️☝☝

6 0
3 years ago
What is the slope of the line containing the ordered pairs (5,-3) and (-2,-3)
Anni [7]

Answer:

0

Step-by-step explanation:

Use the slope formula: m = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}

m = \frac{-3+3}{-2-5}=\frac{0}{-7} =0

The slope of the line is 0.

3 0
3 years ago
If <img src="https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7By%7D" id="TexFormula1" title="\frac{x}{y}" alt="\frac{x}{y}" align="absmid
Delicious77 [7]
This is your answer say me if I am wrong

4 0
3 years ago
Read 2 more answers
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