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3 years ago

How much does 7 3/4 yd of silk ribbon cost if 4/5 yd costs $5.60?

1 answer:

4 0

You will get the answer on cross multiplying

31/4 = x
4/5 = $5.6
(31/4 x 5.6)/4/5 = x
(31/4 x 5.6) x 5/4 = x
x = $54.25

Hope this helps you!

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Ten young adults living in California rated the taste of a newly developed sushi pizza topped with tuna, rice, and kelp on a sca

timurjin [86]

Answer: For California: μ = 33.1; σ² = 1120.50; Range = 32;

For Iowa: μ = 24.5; σ² = 32.73; Range = 19

Step-by-step explanation:

Mean is the average of a population or a sample. It is defined as

μ = ∑x / n, where

x is each number of the set;

n is the total individuals in the sample.

Calculating the Mean for sample of taste of pizza in California:

μ₁ = $\frac{34+39+40+46+33+31+34+14+15+45}{10}$ = 33.1

Calculating the Mean for the sample in Iowa:

μ₂ = $\frac{28+25+35+16+25+29+24+26+17+20}{10}$ = 24.5

Variance measures how far the number in the set is from the mean. Its formula is

σ² = (∑x-μ)² / n -1

which means to find the variance, you have to get the difference between the number and the mean, square the result, add all of them and then divide by (n-1) individuals.

The Variance for the sample in California is

σ² = $\frac{(34 - 33.1)^{2}+(39-33.1)^{2}+(40-33.1)^{2}+(46-33.1)^{2}+(33-33.1)^{2}+(34-33.1)^{2}+(14-33.1)^{2}+(15-33.1)^{2}+(45-33.1)^{2}}{9}$ σ² = 120.50

The Variance for the sample in Iowa is

σ² = 32.73

Range is the difference between the highest and the lowest number of the set: range = highest - lowest

For the sample in California, the Range is

range = 46 - 14 = 32

For the sample in Iowa:

range = 35 - 16 = 19

For California:

Mean = 33.1;
Variance = 120.50;
Range = 32;

For Iowa:

Mean = 24.5;
Variance = 32.73;
Range = 19;

6 0

2 years ago

Exactly how many planes contain points J, K, and N? 0 1 2 3

Archy [21]

Answer:

Step-by-step explanation:

JK and KN is perpendicular.

Thus no planes contained them except 1

Which is a rectangle.

I hope this helps you :)

6 0

2 years ago

I’m actually so dumb!!! How??? Answer???

Pani-rosa [81]

Standard form: 2x - 16 = 0

Factorization: 2(x - 8) = 0

Solutions: x = 16/2 = 8

Hope this helps!

6 0

2 years ago

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amm1812

Sorry what question? I don’t see anything so I can’t help.

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2 years ago

There are 121 students on 7 buses. What is the rate?

Alex_Xolod [135]

Answer: 114 students are put on for buses

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