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3 years ago

Can someone help me plz I really need help on this one plz help and thank you

Mathematics

1 answer:

Bond [772]3 years ago

7 0

Answer:

that is too....much? it's n = 5

Step-by-step explanation:

60/12 = 12n/12

5 = n

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Emi computes the mean and variance for the population data set 87, 46, 90, 78, and 89. She finds the mean is 78. Her steps for f

HACTEHA [7]

Well let’s find the actually mean

First we add up all the numbers

87+46+90+78+89 = 390

Next we divide 390 by how many numbers there are.

390/5 = 78

Therefore the mean is 78

Emi failed to find the difference

7 0

3 years ago

Read 2 more answers

Triangle ABC has vertices at (-4,0) , (-1, 6) and (3,-1) perimeter of triangle ABC, rounded to the nearest tenth ?

makvit [3.9K]

Answer:

The perimeter of triangle ABC is $P=21.8\ units$

Step-by-step explanation:

The perimeter of triangle ABC is equal to

$P=AB+BC+AC$

the formula to calculate the distance between two points is equal to

$d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}$

we have

$A(-4,0),B(-1, 6),C(3,-1)$

step 1

Find the distance AB

$A(-4,0),B(-1, 6)$

substitute in the formula

$d_A_B=\sqrt{(6-0)^{2}+(-1+4)^{2}}$

$d_A_B=\sqrt{(6)^{2}+(3)^{2}}$

$d_A_B=\sqrt{45}\ units$

step 2

Find the distance BC

$B(-1, 6),C(3,-1)$

substitute in the formula

$d_B_C=\sqrt{(-1-6)^{2}+(3+1)^{2}}$

$d_B_C=\sqrt{(-7)^{2}+(4)^{2}}$

$d_B_C=\sqrt{65}\ units$

step 3

Find the distance AC

$A(-4,0),C(3,-1)$

substitute in the formula

$d_A_C=\sqrt{(-1-0)^{2}+(3+4)^{2}}$

$d_A_C=\sqrt{(-1)^{2}+(7)^{2}}$

$d_A_C=\sqrt{50}\ units$

step 4

Find the perimeter

$P=AB+BC+AC$

substitute the values

$P=\sqrt{45}+\sqrt{65}+\sqrt{50}=21.8\ units$

8 0

3 years ago

Ajug contains 42 liters of milk. How

katovenus [111]

Based on the information given the number of milliliters of milk does it contain is 42,000 mL.

1 liter=1000 ml

Using this formula

Number of milliliters=Number of liters×1,000 ml

Where:

Number of liters=42 liters

Let plug in the formula

Number of milliliters=42 liters×1,000 ml

Number of milliliters=42,000 ml

Inconclusion the number of milliliters of milk does it contain is 42,000 mL.

Learn more about milliliters here:brainly.com/question/1295017

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2 years ago

The average of your first three test grades is 78. what grade must you get on your fourth and final test to make your average 80

Alex73 [517]

You need to score 86

7 0

3 years ago

Mary brought $20 to the skating rink. She paid $5.50 admission and $3.75 to rent skates. She also purchased two bottles of water

Salsk061 [2.6K]

Answer:

20-14.5=5.5

Step-by-step explanation:

7 0

3 years ago