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Irina18 [472]
3 years ago
15

17 and 18 please :)?

Mathematics
1 answer:
scoray [572]3 years ago
4 0
17) The wording is not the best, but they want you to do 1/2 + 1/4, which is 3/4.

18) a). vertixes are the pointy bits, the ones at the angles of the faces, and edges connect vertices (count them: there are 8 vertices and 12 edges). Imagine going from one edge to the one farthest from it. If you have playdoh or some breadto cut, try it. You'll see that the section you'll obtain is a rectangle, if what you cut looks like the figure.
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What is another way to write (2x - 3)?​
Norma-Jean [14]

Answer:

See below

Step-by-step explanation:

Many ways...

x+x-3

2x-6+3

5x-3x-3

(4x-6)/2

And the list goes on...

8 0
3 years ago
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Katie can buy four cans of soup for $10. She can buy 18 cans of soup for $30. Kate wants to buy soup for the lowest possible pri
amid [387]
She should buy at the second store due to the fact that you are getting 6 mora for the same price (if you were to buy 30$ worth from the first one)
5 0
3 years ago
A random sample of 4"4 fields" of barley has a mean yield of "49.6"49.6 bushels per acre and standard deviation of 7.997.99 bush
ExtremeBDS [4]

Answer:

The critical value that should be used in constructing the interval is T = 5.8408.

The 99% confidence interval for the true mean yield is between 2.943 bushels per acre and 96.268 bushels per acre.

Step-by-step explanation:

We have the standard deviation of the sample, so we use the students t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 4 - 1 = 3

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 3 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.99}{2} = 0.995. So we have T = 5.8408. This is the critical value.

The margin of error is:

M = T*s = 5.8408*7.99 = 46.668 bushels per acre

In which s is the standard deviation of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 49.6 - 46.668 = 2.943 bushels per acre.

The upper end of the interval is the sample mean added to M. So it is 49.6 + 46.668 = 96.268 bushels per acre.

The 99% confidence interval for the true mean yield is between 2.943 bushels per acre and 96.268 bushels per acre.

8 0
3 years ago
PLEASE HELP ME!!!!
Anettt [7]
1. 8r + 4 = 10 + 2r
-4 -4
8r = 6 + 2r
-2r -2r
6r = 6
R= 1

2. -2(x + 3) = 4x - 3
-2x - 6 = 4x - 3
+3 +3
-2x -3 = 4x
+2x +2x
-3 = 6x
————-
6 6
-1/2 = x
3. 5 + 3(q - 4) = 2(q + 1)
5 + 3q - 12 = 2q + 2
-7 + 3q = 2q + 2
+7 +7
3q = 2q + 9
-2q -2q
Q = 9
4. 7x - 4 = -2x + 1 + 9x - 5
7x - 4 = 7x - 4
-7x -7x
-4 = -4
+4 +4
0 = 0
Infinite answers
5. 8x + 6 - 9x = 2 - x -15
-x +6 = - 13 - x
+ x +x
6 = -13
No solution
5 0
3 years ago
Need help now please, ill give brainliest
emmainna [20.7K]

Answer:

D

Step-by-step explanation:

|| = parallel lines

4 0
3 years ago
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