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elena55 [62]
3 years ago
7

Please help -20 ≥ z - 13z=?

Mathematics
1 answer:
pishuonlain [190]3 years ago
5 0

Answer:

The final answer is:

-7 \geq z

Step-by-step explanation:

Solve the inequality:

-20 \geq z - 13

-Add 13 both sides of the equation:

-20 +13 \geq z - 13 +13

-7 \geq z

So, the answer is -7 \geq z .

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The mean length of time, per week, that students at a certain school spend on their homework is 24.3 hours, with a standard devi
bixtya [17]

Answer:

21.1%

Step-by-step explanation:

(25 - 24.3) / 1.2 = 0.5833 z score = 78.9%

You need the percent that spend more than 25 hrs per week, so 100 - 78.9 = 21.1%

4 0
2 years ago
Percy works two part-time jobs to help pay for college classes. On Monday, he works 3 hours at the library and 2 hours at the co
Hitman42 [59]

Answer:

Hourly wage at the library = x = $7.5

Hourly wage at the coffee cart = y = $7

Step-by-step explanation:

Let

Hourly wage at the library = x

Hourly wage at the coffee cart = y

On Monday, he works 3 hours at the library and 2 hours at the coffee cart and earns $36.50.

Hence:

3x + 2y = 36.5.... Equation 1

On Tuesday, he works 2 hours at the library and 5 hours at the coffee cart and earns $50.

2x + 5y = 50...... Equation 2

Combining both Equations

3x + 2y = 36.5.... Equation 1

2x + 5y = 50...... Equation 2

We solve using Elimination method, Multiply Equation 1 by 2 and Equation 2 by 3 which are coefficients of x to eliminate x

6x + 4y = 73 .. Equation 3

6x + 15y = 150...... Equation 4

Subtract Equation 3 from Equation 4

11y = 77

y = 77/11

y = 7

Solving for x using Equation 2

2x + 5y = 50...... Equation 2

2x + 5 × 7 = 50

2x + 35 = 50

2x = 50-35

2x = 15

x = 15/2

x = 7.5

Therefore,

Hourly wage at the library = x = $7.5

Hourly wage at the coffee cart = y = $7

8 0
2 years ago
You buy a board that measures 120 inches long.
Mama L [17]
Thats 10 feet because there are 12 inches in a foot
6 0
3 years ago
Right triangles \boxed{1}
defon

Considering right-angled triangle XYW, an approximate ratio WY/WX is equal to: A. 0.34.

<h3>How to approximate the ratio WY/WX?</h3>

Considering right-angled triangle XYW, we would apply the law of cosine to approximate the ratio WY/WX. Mathematically, the law of cosine is given by:

cos(θ) = Adj/Hyp

<u>Where:</u>

  • Adj is the adjacent side of a right-angled triangle.
  • Hyp is the hypotenuse of a right-angled triangle.
  • θ is the angle.

Substituting the given parameters into the formula, we have;

cos(θ) = WY/WX

cos(70) = 3.4/10

0.34 = 0.34.

Read more on triangle ratio here: brainly.com/question/26060091

#SPJ1

Complete Question:

Right triangles 1-2 and 3 are given with all their angle measures and approximate side lengths.

Use one of the triangles to approximate the ratio WY/WX

A. 0.34

B. 0.94

C. 1.06

D. 2.76​

4 0
2 years ago
What is 20 times 50 this is reall hard for me pls answer
STatiana [176]

Answer:

the answer is 100

5 0
3 years ago
Read 2 more answers
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