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iragen [17]
2 years ago
13

Y is directly proportional to 1 over the square root of x if y = 7 when x = 36 find y when x = 4

Mathematics
1 answer:
Alecsey [184]2 years ago
5 0

Step-by-step explanation:

y |X(the sign for protionality) 1/√x

y = 7 when x = 36

y = k/√x

7 = k/√36

7 = k / 6 cross multiply

k = 7×6

k = 42

find y when x is 4

y = 42/√x

y = 42/√4

y = 42/2

y = 21

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a chocolate chip cookie has 10 more calories than an ice cream cone. together they have a total of 310 calories.
jasenka [17]

Answer:

The total would be 300

Step-by-step explanation:

310

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300

5 0
3 years ago
Sally and Karl work at different jobs. Sally earns $7 per hour and Karl earns $5 per hour. They each earn the same amount per we
Lisa [10]

Answer:

Karl works 7 hours a week

Step-by-step explanation:

Step 1: Determine total amount that Sally earns

Total amount Sally earns=rate per hour×number of hours worked(h)

where;

Rate per hour=$7 per hour

Number of hours worked=h

Replacing;

Total amount Sally earns=(7×h)=7 h

Step 2: Determine total amount Karl earns

Total amount Karl earns=rate per hour×number of hours worked

where;

rate per hour=$5

number of hours worked=2 more than Sally=h+2

replacing;

Total amount Karl earns=5(h+2)

Step 3: Equate Sally's total earnings to Karl's total earnings and solve for h

7 h=5(h+2)

7 h=5 h+10

7 h-5 h=10

2 h=10

h=10/2

h=5

Karl works (h+2) hours=(5+2)= 7 hours

Karl works 7 hours a week

7 0
3 years ago
Which of the following are the correct answers??
Amanda [17]
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6 0
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THE ANSWER I PUT IS JUST A GUESS, IF IT ISN'T THE ANSWER PLEASE TELL ME WHAT IT IS I BEG YOU ​
Anna [14]

Answer:

the first one

Step-by-step explanation:

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6 0
3 years ago
Read 2 more answers
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