In Chemistry class, Andrew has earned scores of 64, 69, and 73 on three tests. He must maintain an average of 70 to pass the course. What score must Andrew earn on the final exam to pass the course?

Answers

Answer 1

Answer: $64+69+73 = 206$

$(206+x)/(4) =70$

$206+x=280$

$x=74$

Andrew needs at least a 74% on the final exam.

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I am confused on The fraction part..........

Answers

To make this problem easy let's change fraction to decimal.
So, our width is $(3)/(2)$ = 1.5

Area of rectangular prism = l * w * h
= 11 * 1.5 * 4
= 66 inch³
Answer = 66 inch³

Hope this helps you :)

66
1 1/2=1.5
4*1.5*11=66
66 inches

Curtis wants to build a model of a 180 meter tall building. He will be using a scale of 1.5 centimeters = 3.5 meters. How tall will the model be? Round your answer to the nearest tenth.

Answers

You could set up a proportion for this question. 1.5 centimeters = 3.5 meters x centimeters = 180 meters 1.5 x 180 / 3.5 Rounded to the nearest whole number, the answer is 77.

In which quadrant are the y-coordinates of a point negative? Choose all answers that are correct. A. I B. II C. III D. IV

Answers

Quadrant I is top right
Quadrant II is Top Left
Quadrant III is Bottom Left
Quadrant IV is Bottom right.

This is how I like to think of it.

(x, y)

I = (+, +)
II = (-, +)
III = (-, -)
IV = (+, -)

So the answer would be either Quadrant 3 or 4 (Bottom Right or bottom left)

I hope this helps you!

Ms. Carson's art class made a large rectangular mural. The length of the mural is 8 feet, and it's area is 56 square feet. What is the width of the mural?

Answers

Answer:

Step-by-step explanation:

all u do is divide the area by the length

56/8

You do 56/8 the answer is 7

three rock climbers started a climb with each person carrying 7.8 kilograms of climbing equipment. A fourth climber with no equipment joined the group The group divided the total weight of climbing equipment equally among the four climbers

Answers

Answer:

Each carried 1.95 kg weight

Step-by-step explanation:

Given :Three rock climbers started a climb with each person carrying 7.8 kilograms of climbing equipment.

A fourth climber with no equipment joined the group The group divided the total weight of climbing equipment equally among the four climbers

To Find : How much did each carry ?

Solution :

Each person out of three is carrying weight = 7.8 kg

So, Total weight carried by 3 climbers = $7.8 * 3 =23.4$

Now A fourth climber with no equipment joined the group

Total weight is divided among 4

So, weight carried by each climber = $(7.8)/(4)=1.95$

Hence each carried 1.95 kg weight

The correct answer is:

Each climber is carrying 5.85 kg.

Explanation:

3 of the 4 climbers is carrying 7.8 kg each; this is 3(7.8) = 23.4 kg.

Dividing this equally among the 4 climbers, we have 23.4/4 = 5.85 kg each.

For the following geometric sequence find the recursive formula: {-1, 3, -9, ...}.

Answers

Based on these first few terms, we can deduce that the next term is computed by switching the sign of the previous one, and multiplying it by 3: we start with -1, we switch the sign (1) and multiply by 3 (3); then again we switch the sign (-3) and multiply by 3 (-9), and so on.

Since switching sign is the same as multiplying by -1, we can compute every next term by multiplying the previous one by -3:

$a_1 = -1\na_2 = a_1\cdot(-3) = (-1)\cdot(-3)=3\na_3 =a_2\cdot(-3)=3\cdot(-3)=-9$

So, the recursive formula is

$a_n = -3a_(n-1)$

because it states precisely that the next term is -3 times the previous one.

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