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3 years ago

15

Please help with 1 and 3! Please tell me the answer! I'm crying in confusion! :(

1 answer:

Aliun [14]3 years ago

6 0

Don't cry please :(

1:
To find the Average (mean). Add up all the numbers together. Then divide by how many numbers there are.

So use the chart and do what I said :)

2:

To find the mean: Add up all the numbers together. Then divide by how many numbers there are.

To find the median: Put all the numbers in least to greatest. Then if there is a odd amount of numbers. It would be the number in the middle.

To find the mode: The mode is the number that occurs the most.

So use the chart and do what I said :)

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Solve the system of equations algebraically.

andrew11 [14]

Answer: d. (17, 20)

Step-by-step explanation:

We have the following system of equations:

$x-3y=8$ (1)

$5x-4y=5$ (2)

Isolating $x$ from (1):

$x=\frac{8+3y}{4}$ (3)

Substituting (3) in (2):

$5(\frac{8+3y}{4})-4y=5$ (4)

Isolating $y$ :

$\frac{40}{4}+\frac{15 y}{4}-4y=5$ (5)

$10-5=4y-\frac{15 y}{4}$ (6)

$y=20$ (7)

Substituting (7) in (1):

$x-3(20)=8$ (8)

Isolating $x$ :

$x=17$ (9)

Hence, the correct option is d. (17, 20)

8 0

3 years ago

What is the perimeter of the trapezoid with vertices Q(8, 8), R(14, 16), S(20, 16), and T(22, 8)? Round to the nearest hundredth

andre [41]

Answer:

The perimeter is 38.25 units

Step-by-step explanation:

The perimeter of the tra-pezoid is the distance around it.

The length of the bases can be found using the absolute value method.

|RS|=|20-14|=6 units.

|TQ|=|22-8|=14

Recall the distance formula;

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

We use the distance to find the non parallel sides.

$|ST|=\sqrt{(20-22)^2+(16-8)^2} =8.25$ units.

and

$|QR|=\sqrt{(8-14)^2+(16-8)^2} =10$ units.

The perimeter of the tra-pezoid is

=14+10+6+8.25=38.25

7 0

3 years ago

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HELP ASAP!!! WILL GIVE BRAINLIEST! Given that RS=20 and QR=5, identify the length of PS¯¯¯¯¯.

cestrela7 [59]

Answer:

PS = 10 $\sqrt{5}$

Step-by-step explanation:

8 0

2 years ago

15^8 divided by 7x =

Damm [24]

Answer:

366127232

Step-by-step explanation:

i just divided the number and exponent and assumed x equals to 1 cause every variable is =to 1 unless it tells you what it equals to.

7 0

2 years ago

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Mixed number fraction 7 1/5+3 2/5

andrezito [222]

Answer: 10 3/5

Step-by-step explanation: 7+3 = 10

1+2=3

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8 0

3 years ago

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