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Artyom0805 [142]
3 years ago
7

Which of the following items has the lowest unit price? 4 for $5.00 $1.22 each 6 for $7.44 3 for $3.60

Mathematics
1 answer:
aev [14]3 years ago
3 0
3 for 3.60 the unit price come out to 1.20
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A rectangular book measures 18 x 9. What is the length of its diagonal? Round your answer to the nearest tenth
avanturin [10]

Answer:

20.1246118 or 20.12

Step-by-step explanation:

First draw the box with the diagonal, as you can see it is split into 2 equal right triangles. Now use the pythagorean theorem (a^2+b^2=c^2) to find the length of the diagonal

6 0
3 years ago
Alex drew a shape that belongs to both the category of rhombuses and the category of rectangles. Alex said the most specific nam
Nina [5.8K]

Answer:

yes because a rhombus and a rectangle are counted as a quadrilateral because they have 4 sides

Step-by-step explanation:

8 0
3 years ago
A drug company is testing a new drag which is supported to reduce blood pressure. From the nine people who are used as subjects,
Pie

Answer:

The 95% confidence interval for the mean change in blood pressure, \bar{x}, is 1.744 < \bar{x} < 2.816

Step-by-step explanation:

The parameters given are;

The number of people in the sample, n = 9

The average drop in blood pressure, \bar{x} = 2.28 points

The standard deviation, σ = 0.82

The confidence level = 95%

The formula for confidence interval with a known mean is given as follows;

CI=\bar{x}\pm z_{\alpha/2} \dfrac{\sigma}{\sqrt{n}}

Where:

z_{\alpha/2} = z - score at 95% confidence level = 1.96

We therefore have;

CI=2.28 \pm 1.96 \times \dfrac{0.82}{\sqrt{9}}

Which gives the 95% confidence interval for the mean change in pressure, \bar{x}, is given as follows;

1.744 < \bar{x} < 2.816

6 0
3 years ago
The perimeter of a rectangle is 96 yards and the length is 14 yards more than the width what are the dimensions of the rectangle
____ [38]

Answer:

17 yards and 31 yards.

Step-by-step explanation:

Since length is 14 more than width, lets call width: w and length: w+14

So perimeter is 96 so: 2w+2(w+14)=96

2w+2w+28=96 so 4w+28=96

4w=68 and finally w=17

So 17 yards and 31 yards.

6 0
1 year ago
Evaluate a+b for a= -9 and b=6
jeka94

Answer:

-9+6=-3

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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