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allsm [11]
3 years ago
8

Evaluate the expression when x=3, y= -4, and z= -6 xy _ z

Mathematics
1 answer:
NeTakaya3 years ago
3 0
The answer is probably 2 because if you plug in the numbers you would get 
3x-4=-12 divided by -6 = +2.
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What is this called, like whats the name of this thing??<br> {18 ≤ y ≤ 30}
Tpy6a [65]

Answer:

An inequality.

Step-by-step explanation:

This gives the range of values that y can take.

It can equal 18 or be greater than eighteen but it also could be 30 or less than thirty.

WE read the signs starting from y to the left  and to the right.

So y is greater or equal to 18 and less than or equal to 30.

3 0
3 years ago
Assume that the two polygons are similiar, with the same orientation.
spin [16.1K]

Answer:

4/6=t/(t+1)

Step-by-step explanation:

4/6=t/(t+1)

8 0
3 years ago
A survey of 225 students showed the mean number of hours spent studying per week was 20.6 and the standard deviations was 2.7
LekaFEV [45]

Answer:

The margin of error is approximately 0.3

Step-by-step explanation:

The following information has been provided;

The sample size, n =225 students

The sample mean number of hours spent studying per week = 20.6

The standard deviation = 2.7

The question requires us to determine the margin of error that would be associated with a 90% confidence level. In constructing confidence intervals of the population mean, the margin of error is defined as;

The product of the associated z-score and the standard error of the sample mean. The standard error of the sample mean is calculated as;

\frac{sigma}{\sqrt{n} }

where sigma is the standard deviation and n the sample size. The z-score associated with a 90% confidence level, from the given table, is 1.645.

The margin of error is thus;

1.645*\frac{2.7}{\sqrt{225}}=0.2961

Therefore, the margin of error is approximately 0.3

5 0
3 years ago
Read 2 more answers
6th grade math i mark as brainliest
Natasha_Volkova [10]

Answer:

16

Step-by-step explanation:

8 0
3 years ago
The strength of a cable is proportional to the square of its diameter. If a 2-cm cable will support 800kg, how much will a 3-cm
xz_007 [3.2K]
Strength [is proportional to] d^2
strength1/(d1)^2 = strength2/(d2)^2
800kg/(2cm)^2 = strength2/(3cm)^2
strength2 = 800 kg * (3 cm)^2/(2 cm)^2
strength2 = 800 kg * 3^2/2^2
strength2 = 800 kg * 9/4
strength2 = 1800 kg
3 0
3 years ago
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