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4 years ago

Can you help me please and thank and it 7 and 9

Mathematics

1 answer:

Charra [1.4K]4 years ago

6 0

7: to get the same amount of hot dogs and buns you need to buy three packages of hot dogs and two packages of buns.

9: I disagree with anna because 77 M&M's divided by 9 (the amount in each bag) equals a total of 8.55 bags.

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What is [b-5] over 8=5

julia-pushkina [17]

Answer:

B=45

Step-by-step explanation:

Multiply 8 by 5

Add 40 and 5 together

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3 years ago

Find each function value f(-4) if f(x) = -5x - 3

Firlakuza [10]

Answer: f(-4) = 17

Step-by-step explanation: Substitute (-4) for x.

f(-4) = -5(-4) - 3
f(-4) = 20 - 3
f(-4) = 17

4 0

3 years ago

Read 2 more answers

Segment AB is completely rotated about the y-axis to form a 3-D figure. Find the volume of the figure. The

Lady bird [3.3K]

Answer:

The volume of the figure is 905 cubic units.

Step-by-step explanation:

Rotation is a method of solid transformation which involve turning a given line, or object about a reference point. In the given question, rotating segment AB completely about the y-axis would form a 3 dimensional figure of a sphere.

volume of a sphere = $\frac{4}{3}$ $\pi$ $r^{3}$

where r is the radius of the sphere.

Given that AB = 6, then the radius of the sphere = 6

volume of sphere = $\frac{4}{3}$ x $\frac{22}{7}$ x $(6)^{3}$

= $\frac{88}{21}$ x 216

= 905.14

volume of sphere = 905 cubic units

The volume of the figure is 905 cubic units.

3 0

3 years ago

A rectangle has a side length of (x+2) meters and a width of (2x+3) meters.

Kaylis [27]

Step-by-step explanation:

area=length x width

91=(x+2)(2x+3)

91=x^2+5x+6

x^2+5x-85=0

x=14.2 orx=-24.1

7 0

3 years ago

A data set lists weights (lb) of plastic discarded by households. The highest weight is 5.31 lb, the mean of all of the weight

a_sh-v [17]

Answer:

a) The difference is of 3.222 lbs.

b) 1.64 standard deviations.

c) Z = 1.64

d) Not significant, as the z-score of 1.64 is between -2 and 2.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

The mean of all of the weights is x=2.088 lb, and the standard deviation of the weights is s=1.968 lb.

This means that $\mu = 2.088, \sigma = 1.968$

a. What is the difference between the weight of 5.31 lb and the mean of the weights?

This is $X - \mu = 5.31 - 2.088 = 3.222$

The difference is of 3.222 lbs.

b. How many standard deviations is that [the difference found in part (a)]?

This is the z-score. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{5.31 - 2.088}{1.968}$

$Z = 1.64$

1.64 standard deviations.

c. Convert the weight of 5.31 lb to a z score.

Z = 1.64, as found above.

d. If we consider weights that convert to z scores between −2 and 2 to be neither significantly low nor significantly high, is the weight of 5.31 lb significant?

Not significant, as the z-score of 1.64 is between -2 and 2.

5 0

3 years ago