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tangare [24]
4 years ago
14

Suppose A = {1, 7, 13, 17, 21, 25} and B = {7, ,14, 21, 28, 35, 42}. What is A∩B?

Mathematics
1 answer:
Lubov Fominskaja [6]4 years ago
8 0

A\cap B=\{7,21\}

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What is the distance between point A(-3,2) and point B(5,-1)
Gnoma [55]

Remember the distance formula

S=\sqrt{(5+3)^{2}+(-1-2)^{2} }

S=\sqrt{8^{2}+(-3)^{2} }

S=\sqrt{64+9}

S=\sqrt{73}


8 0
4 years ago
3 people divide $30 charge. They get refund of 1 dollar each and cashier keeps 2 dollars. When cross checking you multiply 9x3=2
Inessa [10]

Answer:

First, 3 people divide $30, then each one of them pays:

$30/3 = $10.

Each one of them gets $1 in refound.

Then at the moment, each one of them paid $9, and there are 3 friends, so the total amount is 3*$9 = $27.

We also know that the cashier keeps $2, but these $2 must come from the $27 that the friends paid.

Then we will have $27 = $25 + $2.

This means that the total cost was $25, and the cashier kept $2 as a tip.

Now, in your problem, you add the $2 that the cashier kept to the $27 that the friends paid. While those $2 actually are already counted in the $27 that the friends paid.

7 0
3 years ago
Answer this as quick as possible please! (NO EXPLANATION REQUIRED!) <3
shtirl [24]

Answer: 9 Apples

Step-by-step explanation:

Given the following :

Total number of bags = 12

Mean of the distribution(m) = 8

Number of apples (x):

6 - - - - 7 - - - - 8 - - - - 9 - - - - 10

Frequency (f) :

1 - - - - 4 - - - - 2 - - - - 3 - - - - 1

Therefore :

Let number of apples in the 12th bag = y

Frequency of 12th bag : (12 - 11) = 1

Mean of distribution(m) :

Sum of ( f * x) / sum of f

Sum of (f * x) = (6*1)+(7*4)+(8*2)+(9*3)+(10*1)+(y*1)

Sum of (f * x) = (6+28+16+27+10+y) = 87 + y

Sum of f = 12

From :

m = Sum of ( f * x) / sum of f

8 = (87 + y) / 12

87 + y = 12 * 8

87 + y = 96

y = 96 - 87

y = 9

Number of apples in 12th bag is 9 apples

6 0
3 years ago
I think of a number and add one fourth of it to half of it and the result is twelve. What is the number I thought of?
belka [17]

Suppose that the number u were thinking about is x thus :

\frac{1}{4} x +  \frac{1}{2} x = 12 \\

Multiply both sides by 4

4 \times ( \frac{1}{4} x +  \frac{1}{2} x) = 4 \times 12 \\

x + 2x = 48

3x = 48

Divide both sides by 3

\frac{3x}{3}  =  \frac{48}{3  }  \\

x = 16

3 0
3 years ago
Marni used a calculator to find 8 × (3 + 2) ÷ 10 and got a result of 2.6. Which statements about her work are true? Check all th
luda_lava [24]
8 times 5 equals 40 and 40 divided by 10 equals 4 sir Marni didn’t get anything right
5 0
3 years ago
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