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3 years ago

T

Mathematics

2 answers:

trapecia [35]3 years ago

6 0

Answer:not sure sry but I dont know how to come out of this so I will answer in the comments after I post this

Step-by-step explanation:

aev [14]3 years ago

3 0

Answer:

Use the chart to answer the questions.

What is the total economic cost of building a small pyramid?

$23,000

What is the total economic cost of building a large pyramid?

$57,500

Which pyramid has a lower total economic cost?

the small pyramid

Step-by-step explanation: i got it correct trust me

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Find a+b,2a+3b,IaI, and Ia-bI. a[5, -12], b=[-3, -6]

DENIUS [597]

Answer: 1) $2\hat{i}-18\hat{j}$ 2) $\hat{i}-6\hat{j}$ 3) 13, 4) 10.

Step-by-step explanation:

Since we have given that

$\vec{a}=5\hat{i}-12\hat{j}\\\\and\\\\\vec{b}=-3\hat{i}-6\hat{j}$

So, we need to find :

1) a + b is given by

$5\hat{i}-12\hat{j}-3\hat{i}-6\hat{j}\\\\=2\hat{i}-18\hat{j}$

2) 2a+3b is given by

$2(5\hat{i}-12\hat{j})+3(-3\hat{i}-6\hat{j})\\\\=10\hat{i}-24\hat{j}-9\hat{i}+18\hat{j}\\\\=\hat{i}-6\hat{j}$

3) |a| is given by

$\sqrt{5^2+(-12)^2}\\\\=\sqrt{25+144}\\\\=\sqrt{169}\\\\=13$

4) |a-b| is given by

$\sqrt{(5+3)^2+(-12+6)^2}\\\\=\sqrt{8^2+6^2}\\\\=\sqrt{64+36}\\\\=\sqrt{100}\\\\=10$

Hence, 1) $2\hat{i}-18\hat{j}$ 2) $\hat{i}-6\hat{j}$ 3) 13, 4) 10.

6 0

2 years ago

4 less than the product of 2 and a number is 18 what is the equation?

qwelly [4]

The equation is 2(n)-4=18.

5 0

2 years ago

What is the domain and range of the equation y = -(x - 3)2 + 9

vekshin1

Answer:y=9

Step-by-step explanation:

6 0

3 years ago

Xyz are in 3:3:6.what are the measures of the angles

Anni [7]

Answer:

Set up an equation equal to 180o

Explanation:

3x+3x+6x=180

12x=180

x=18012=15

So, the measure of the angles are:

3x=3×15=45
3x=3×15=45
6x=6×15=90

6 0

3 years ago

Let f(x)=x^2+5x−8. What is the average rate of change from x = 2 to x = 6?

Savatey [412]

And that is how you get your answer

3 0

3 years ago