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yaroslaw [1]
3 years ago
8

How many gallons of a 70% antifreeze solution must be mixed with 60 gallons of 25% antifreeze to get a mixture that is 60% antif

reeze?
Mathematics
1 answer:
Arisa [49]3 years ago
5 0

I’m so so sorry I don’t know though
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Pls just type it in no files pls and thank you
Nana76 [90]

Answer:

31

Step-by-step explanation:

First type of clay required 3 cups of flour per batch

She made 5 batches

5 * 3 = 15

So she used 15 cups of flour for the first type of clay

Second kind of clay required 4 cups of flour per batches

She made 4 batches

4 * 4 = 16

So she used 16 cups of flour for the second type of clay

we now add the total number of cups of flour used for each type of clay

16 + 15 = 31

She used a total of 31 cups of flour

5 0
3 years ago
Bobby is 12 years old. His age is nine
KatRina [158]

Answer:

65 because 12 plus 9 is 21 then 3 times 21 is 65

4 0
2 years ago
A simple random sample of 36 men from a normally distributed population results in a standard deviation of 10.1 beats per minute
Katyanochek1 [597]

Answer:

Step-by-step explanation:

Given that:

sample size n = 36

standard deviation = 10.1

level of significance ∝ = 0.10

The null hypothesis and the alternative hypothesis can be computed as follows:

H_0 : \sigma = 10

H_1 : \sigma \neq 10

The test statistics can be computed as follows:

X^2 = \dfrac{(n -1)s^2 }{\sigma ^2}

X^2 = \dfrac{(36 -1)10.1^2 }{10^2}

X^2 = \dfrac{(35)102.01 }{100}

X^2 = \dfrac{3570.35 }{100}

X^2 =35.704

degree of freedom = n - 1 = 36 - 1 = 35

Since this test is two tailed .

The P -value can be determined by using the EXCEL FUNCTION ( = 2 × CHIDIST(35.7035, 35)

P - value = 2 × 0.435163515

P - value = 0.8703      ( to four decimal places)

Decision Rule : To reject the null hypothesis if  P - value is less than the 0.10

Conclusion: We fail to reject null hypothesis ( accept null hypothesis) since p-value is greater than 0.10 and we conclude that there is sufficient claim that the normal range of pulse rates of adults given as 60 to 100 beats per minute resulted to a standard deviation of 10 beats per minute.

3 0
3 years ago
PLS HELP I NEED TO FIND THE ACTUAL DISTANCE BETWEEN WACH OAIR IF CITIES AND IF NECESSARY I HAVE TO ROUND TO THE NEAREST TENTH
kolbaska11 [484]

1; 127 mi

2;78

Sorry i did not know the other answers

I hoped this helped

8 0
3 years ago
What is 47 times 77 bdgsbJbsjavw moo y
kakasveta [241]

Answer:

moo (seriously tho this is a joke)

Step-by-step explanation:


7 0
3 years ago
Read 2 more answers
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