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3 years ago

Help? I don’t understand it

Mathematics

2 answers:

Karo-lina-s [1.5K]3 years ago

8 0

Answer:

Step-by-step explanation:

decreasing is a key word meaning negitive

Flura [38]3 years ago

7 0

Answer:

Step-by-step explanation:

Decrease shows negative and also if temperature decreases , it mostly is negative

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What is a simpler form of the expression? (4k + 5)(3k^2 - 4k - 4)

Maru [420]

Answer:

$12k^3 -k^2-36k-20$

Step-by-step explanation:

Step 1: Distribute

$(4k + 5)(3k^2 - 4k - 4)$

$(4k * 3k^2)+(4k*-4k)+(4k*-4)+(5*3k^2)+(5*-4k)+(5*-4)$

$12k^3-16k^2-16k+15k^2-20k-20$

Step 2: Combine like terms

$12k^3+(-16k^2+15k^2)+(-16k-20k)-20$

$12k^3 -k^2-36k-20$

Answer: $12k^3 -k^2-36k-20$

4 0

3 years ago

The scores and their percent of the final grade for a statistics student are given. What is the student's weighted mean score?

Phantasy [73]

Answer:

The student's weighted mean score is 92.2.

Step-by-step explanation:

To find the student's weighted mean scored, we multiply each grade by it's weight.

Grades and weights:

Homework: Grade of 86, weight of 20% = 0.2

Quiz: Grade of 87, weight of 5% = 0.05

Quiz: Grade of 91, weight of 5% = 0.05

Project: Grade of 98, weight of 45% = 0.45

Final Exam: Grade of 88, weight of 25% = 0.25.

What is the student's weighted mean score?

0.2*86 + 0.05*87 + 0.05*91 + 0.45*98 + 0.25*88 = 92.2

The student's weighted mean score is 92.2.

7 0

3 years ago

I-Ready

Westkost [7]

Answer:

1/3 feet.

Step-by-step explanation:

The length = area / width

= 7/9 / 2 1/3

= 7/9 / 7/3

= 7/9 * 3/7

= 3/9

= 1/3 feet,

7 0

4 years ago

Read 2 more answers

Which of these two kites we use more paper to make? Circle your answer?

motikmotik

Answer:

I believe both kites use the same amount of paper

Step-by-step explanation:

They both have equal measures but I'm not too sure

7 0

3 years ago

grigory [225]

Answer:a

Step-by-step explanation:

3 0

4 years ago