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KengaRu [80]
3 years ago
6

S varies directly as t. if s is 20 when t is 4 then t is ____ when s is 30

Mathematics
2 answers:
Oliga [24]3 years ago
5 0

Answer:

6

Step-by-step explanation:

We are doing unit rate.

Unit rate is when you get the value for 1 of the variables. In this, we would want to get the value for t. We do\frac{20}{4}=5 to find the t value. Now we do \frac{30}{5}=6 to find the value of the missing t. T=6.

Hope it Helps!

Zinaida [17]3 years ago
5 0

Answer:

t is 6 I believe

Step-by-step explanation:

t=4 s=20

20/2=4/2 divide both sides by 2 to simplify it

Then you get t=2 & s=10

then multiply 10 by 3 to get 30, and you do this to both sides so 2*3= 6

so when s is 30, t is 6

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Show how Carly can work out 171/2% of 240 in her head
KATRIN_1 [288]

17 ½ % of 240

First option

Change  the fraction ½ to a decimal. It would be 0.5 ( 1 divided by 2)

½=0.5

You will add the whole number 17 to the result.

17 + 05 = 17.5

Now you will divide by 100 (percent)

17.5 /100  To divide a decimal by 100,  move the decimal point two places to the left.

17.5 /100 = 0.175   times 240

0.175 x 240 = 42

Second option

Change the percent to an improper fraction

17 ½= 35/2 (you have to multiply (2 x 17) plus 1 equals 35 over 2 ( keep the denominator). It will be 35/2.  Put the other number (240) over 100 and multiply.

35/2 x 240/100 = 42

There is another way . You can simplify

Cancel all the zeros that you have and start to reduce.

            6

7       12

35 x 24<span> 0   </span> =  42

2       10 0

 1          5

           1

17 ½ % of 240  =  42

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3 years ago
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3 years ago
Subtract 4 from n then multiply by 6
geniusboy [140]

Answer:

multiply 4 and 6 and the answer should be n-24

Step-by-step explanation:

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n-24

3 0
3 years ago
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mixas84 [53]
Y = 1/4x -5

HOPE THIS HELPS

3 0
3 years ago
URGENT
Dmitry [639]

Answer:

AAA

Step-by-step explanation:

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