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Julli [10]
2 years ago
9

2 1/3 ÷ 1 3/4-2.6÷1.3 pls i rlly need help anything will help

Mathematics
1 answer:
Nat2105 [25]2 years ago
3 0

Answer:

The answer is -2/3

Step-by-step explanation:

Multiply by the reciprocal:

7/3 / 1/4 x 2

Simplify expression:

7/3 x 4/7 -2

Calculate:

1/3 x 4 -2

4/3 - 2

= -2/3

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A piece of sheet metal is 24 inches wide the cross section is 54 what is the depth
Leni [432]

Answer:

Width = 18, height = 3

Or

Width = 6, height = 9

Step-by-step explanation:

Complete question

( A piece of sheet metal 24 inches wide is bent to form a gutter as shown in the picture below, if the cross sectional area is 54 square inches, find the depth of the gutter).

X = width, Y = height

X - 2y = 24........ equation i

X = 24 - 2y.......... equation ii

Area = xy

54 = xy........ equation iii

Put equation ii into equation iii

54 = (24 - 2y) * y

54 = 24y - 2y²

2y² - 24y + 54 = 0........ equation iv

Solving equation iv using quadratic methods,

Factors = (y-3), (y-9)

(Y-3)(y-9) = 0

y = 3 or y = 9

Substitute y = 3 or y = 9 into equation ii

X = 24 -2(3) = 18 or x = 24 - 2(9) = 6

If Width = 18, height = 3

Or

Width = 6, height = 9

3 0
3 years ago
You scored an 85 on a test. This corresponds to a z-score of 1.80. What percentage of the scores are better than yours?
Scrat [10]

At a z-score of 1.80, the percentage of the scores that are better than yours is equal to 3.59%.

<h3>What is a z-score?</h3>

In Mathematics, a z-score is sometimes referred to as a z-value or standard score and it can be defined as a measure of the distance between a raw score and the mean, when standard deviation units are used.

<h3>How to determine the percentage?</h3>

Mathematically, the z-score of a given sample score in a normal distribution can be calculated by using this formula:

Z-score = (x - μ)/σ

Where:

  • x represents the sample score.
  • σ represents the standard deviation.
  • μ represents the mean score.

Since a score of 85 on a test corresponds to a z-score of 1.80, the percentage of the scores that are better than yours is given by:

P(x > 85) = P(z > 1.80)

P(z > 1.80) = 0.0359

P(z > 1.80) = 3.59%.

Read more on z-scores here: brainly.com/question/26714379

#SPJ1

5 0
1 year ago
Please help me I will give you brainliest
Salsk061 [2.6K]

ok here you go its B

3 0
3 years ago
Hi, I keep getting 41.7 but it isnt one of the choices :/ GIVING BRAINLIEST TO WHOEVER EXPLAINS FIRST
tangare [24]

Answer: 31.7

Step-by-step explanation:

Do 16 plus 15.7 is 31.7 you added wrong.

8 0
2 years ago
Read 2 more answers
Two number cubes are rolled sequentially. What is the probability that the first number cube shows a Four and the second number
galben [10]

Answer:

\frac{1}{12}

Step-by-step explanation:

<h2>This is an independent event probability problem , that is the first event does not affect the occurrence of the second event.</h2>

The sample space of the first die is S1= {1,2,3,4,5,6}

The sample space of the second die is S2= {1,2,3,4,5,6}

1. the probability that the first number cube shows a Four  pr (4)= \frac{1}{6}

2. the probability that the second number cube shows an odd number=

odd numbers in the sample space are 1,3,5= 3

pr(odd) = \frac{3}{6} = \frac{1}{2}

For the two event to happen the probability is = \frac{1}{6}*\frac{1}{2}=\frac{1}{12}

4 0
3 years ago
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