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Goshia [24]
3 years ago
10

PLEASE HELP ME

Mathematics
2 answers:
shutvik [7]3 years ago
5 0

Answer:

40=31.56+r     r=8.44

Step-by-step explanation:

40   =  31.56 + r

-31.56 -31,56

8.44=x

Hope this helps :)

Basile [38]3 years ago
4 0

Answer:

r = $8.44

Step-by-step explanation:

40-31.56=r

40-31.56=8.44

so r = 8.44

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23. If XY = 13, XA = 4, and XZ = 26, then XB =​
UkoKoshka [18]

Answer:

It is given that in triangle XYZ, XY = 13, YZ=20, and XZ=25.Using the law of cosines, we have

CosC=\frac{a^2+b^2-c^2}{2ab}

cosZ=\frac{(YZ)^2+(XZ)^2-(XY)^2}{2(YZ)(XZ)}

CosZ=\frac{(20)^2+(25)^2-(13)^2}{2(20)(25)}

CosZ=\frac{400+625-169}{1000}

CosZ=\frac{856}{1000}

CosZ=0.856

Z=cos^{-1}(0.856)

Z=37.13^{\circ}

Step-by-step explanation:

5 0
4 years ago
Lydia collects shells. She has 24 sea snail shes
Wittaler [7]

Answer:

11

Step-by-step explanation:

the greatest common factor is 8 so you know you have to have 8 rows, divide all of those number by 8 and add the answers

8 0
4 years ago
Read 2 more answers
You need 1 1/4 cups of sugar to make 20 cookies. To make 12 cookies you will need ____ cups of sugar?
iris [78.8K]

Answer:

0.75 or 3/4 cups

Step-by-step explanation:

Make a proportion

We need 1 1/4, or 1.25 cups of sugar for 20 cookies, and we need x cups of sugar for 12 cookies

1.25/20=x/12

To solve, we need to get the variable,x, by itself. It is being divided by 12. To reverse this, multiply both sides by 12.

12(1.25/20)=(x/12)12

The 12s on the right will cancel, and we are left with

0.75=x

0.75 is equivalent to 3/4

So, 0.75 or 3/4 cups of sugar is needed to make 12 cookies

4 0
3 years ago
One of the products produced by Branco Food Company is All-Bran Cereal, which competes with three other brands of similar all-br
Ksju [112]

The question is incomplete. The complete question is :

One of the products produced by Branco Food Company is All-Bran Cereal, which competes with three other brands of similar all-bran cereals. The company's research office wants to investigate if the percentage of people who consume all-bran cereal is the same for each of these four brands. Let us denote the four brands of cereal by A B C and D. A sample of 900 persons who consume all-bran cereal was taken, and they were asked which brand they most often consume. Of the respondents, 201 said they usually consume Brand A, 224 consume Brand B, 299 consume Brand C, and 176 consume Brand D. Does the sample provide enough evidence to reject the null hypothesis that the percentage of people who consume all-bran cereal is the same for all four brands? Use alpha = 0.025. Find the value of the test statistic x^2. x^2 = the tolerance is +/-2% Using alpha = 0.025, can you conclude that the current percentage distribution is different from the hypothesized one? We conclude that the current percentage distribution from the hypothesized one.

Solution :

          A      B      C      D               Total

$o_i$      201   224   299  176            900

$e_i$      225  225    225  225

$X^2 =\sum \frac{(o_i-e_i)^2}{e_i} = 37.5733$

$X^2 = 9.3484$

We reject $H_0$

$\alpha = 0.025$ level

$H_0: A = B=C=D\ \ \ (1/4)$

$H_a: A,B,C,D $  are not equal.

The distribution is multinomial hypothetical distribution.

4 0
3 years ago
What type of math is adding subtracting of positive and negative numbers
allochka39001 [22]
Hello There!

It is Arithmetic.

Hope This Helps You!
Good Luck :)
6 0
4 years ago
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