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3 years ago

Wich one is cheer to buy 20 for 4.40 or 24 for 4.80

Mathematics

1 answer:

lawyer [7]3 years ago

6 0

4.4/20=0.22 per item 4.8/24=0.2 per item Answer: 24 for 4.80

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What is j divided by 9 is 5

kobusy [5.1K]

J/9=5
Multiply both sides by 9
Which gets you
j = 45

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4 years ago

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Help me figure out 49x79

Ahat [919]

That equals 3871 hope it helps

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4 years ago

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Please help me I am horrible at calculations<br> Solve for x when y=-0.27<br><br> 5y+8(x−3y)=7x−12

expeople1 [14]

Answer:

X = -12.54 (I am a Math Class Topper in both 6th Grade an 7th Grade)

Step-by-step explanation:

5 x .27 = 1.35

8x - (3 x .27) = .81

1.35 + 8x - .81 = 7x - 12

- 7x - 7x

----------------------------------

1.35 + X - .81 = -12

+ .81 +.81

---------------------------

1.35 + X = -11.19

-1.35 -1.35

-----------------------

X = -12.54

6 0

4 years ago

At time tequals0, water begins to drip out of a pipe into an empty bucket. After 14 minutes, there are 7 inches of water in th

Vaselesa [24]

Answer:

$w=0.5t$

Step-by-step explanation:

Given:

'w' represents inches of water left after 't' minutes of time.

The dripping out of water is a linear function.

At time 't' equal to 0, the bucket was empty.

After 14 minutes, there are 7 inches of water in the bucket.

A linear function model is of the form: $w=mt+b$

$Where, m\to\textrm{dripping rate of water}\\b\to\textrm{water level at t=0}$

Now, at $t=0,w=0(\textrm{As bucket was empty})$

At $t=14,w=7$

Therefore, plugging these values in the above linear model and solving the system of linear equations. This gives,

$0=m(0)+b\\0=0+b\\b=0\\\\7=14m+0\\m=\frac{7}{14}=0.5\ in/min$

Therefore, the values of 'm' and 'b' are 0.5 and 0 respectively.

Thus, the linear model is given as:

$w=0.5t$

4 0

3 years ago

The ratio of dogs to cats in a pet store is 4 : 34:3 . The ratio of cats to fish in the same pet store is 2 : 92:9. If there ar

dybincka [34]

Answer: In the pet store, there are 81 fish.

Step-by-step explanation:

We know that:

The ratio of dogs to cats is 4:3

(this means that for every 4 dogs, there are 3 cats)

The ratio of cats to fish is 2:9

(this means that for every 2 cats, there are 9 fish).

Now, we know that there are a total of 24 dogs in the pet store.

Remembering that for each 4 dogs we have 3 cats, we first need to see how many times we have 4 dogs in a total of 24 dogs, this is:

24/4 = 6

So we have 6 times 4 dogs, then we will have 6 times 3 cats, this is a total of:

6*3 cats = 18 cats.

And now we know that for every 2 cats we have 9 fish.

Then we need to see how many times we have 2 cats in a total of 18 cats, this is:

18/2 = 9.

And for each one of these 9 groups, we will have 9 fish, then the total number of fish is:

9*9 = 81 fish

In the pet store, there are 81 fish.

6 0

3 years ago