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3 years ago

Find A X B if A = {a,b} and B = {2,5}.

Mathematics

2 answers:

Arlecino [84]3 years ago

6 0

Answer:

I am not so sure i think it is 2a+5b something like that

nataly862011 [7]3 years ago

5 0

Answer:

A×B={(a,2),(a,5),(b,2),(b,5)}

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Anna35 [415]

Answer:

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3 years ago

A square garden has sides of length 14 ft. What is the perimeter?

steposvetlana [31]

A square has 4 sides of equal length

so the perimiter is 4s where s is the length of 1 side

so if the length of 1 side is 14 then
P=4s
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P=56ft

the perimiter is 56ft

7 0

4 years ago

Read 2 more answers

A tank and a pail contained a total of 962 ml of water. When 250 ml of water was poured from the pail to the tank, the amount of

Allisa [31]

By solving a system of equations, we will see that the pail originally contained 382.9 ml.

<h3>How to write the system of equations?</h3>

First, we need to define the variables, we will use:

T = amount of water in the tank.
P = amount of water in the pail.

First, we know that the total amount of water is 962 ml, then we have:

P + T = 962 ml.

We also know that if we pour 250 ml from the pail to the tank, the amount of water in the tank will be 12 times the amount of water in the pail, this is written as:

T + 250ml = 12*(P - 250ml)

Then the system of equations is:

P + T = 962 ml

T + 250ml = 12*(P - 250ml)

To solve this, first, we need to isolate one of the variables in one of the equations, I will isolate T in the first one:

T = 962 ml - P

Now we replace this into the other equation to get:

(962 ml - P) + 250ml = 12*(P - 250ml)

Now we can solve this for P.

962 ml + 250 ml - P = 12*P - 12*250 ml

1,212 ml - P = 12*P - 3,000 ml

1,212 ml + 3,000 ml = 12*P - P

(4,212 ml)/11 = P = 382.9 ml

So the pail originally contained 382.9 ml

If you want to learn more about systems of equations, you can read:

brainly.com/question/13729904

4 0

2 years ago

Torri had $20 to buy a birthday present for her dad. She decided to buy a DVD for $18. The sales tax is 7 percent. Does she have

vesna_86 [32]

First, we need to calculate the cost of the sale tax. To do it, we are going to convert the sale tax from percentage to fraction by dividing it by 100, and then we are going to multiply the cost of the DVD by the sale tax:

$Sale.Tax=\frac{7}{100}$

Now, we can multiply the cost of the DVD by the sale tax to find the cost of the sale tax:

$Cost.Sale.Tax=18(\frac{7}{100)} )=9(\frac{7}{50} )=\frac{63}{50} =1.26$

Now that we know that the sale tax is $1.26, we are going to add the cost of the sale tax to the cost of the DVD and check if that sum is less or equal than Torri's money (20$):

$Total.Cost=18+1.26=19.26$

Since $19.26 $\leq$ $20, we can conclude that Torri has enough money to buy the DVD. In fact, Torri will end with a change of $0.74 after buying the DVD.