MATHEMATICS HIGH SCHOOL

How did the development of irrigation systems improve living conditions? a. It made people less dependent on trade.
b. It made people switch from hunting to herding.
c. It gave people a surplus of food.
d. It allowed people to move out of town onto farms.

Answers

Answer 1
Answer:    I think your answer would be C. it gave people a surplus. Because now they could water their crops faster, which means you would get more ground covered . Which results in having a surplus. Because it's a faster way to raise crops.
Answer 2
Answer:

C. itgave people a surplus of food.


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MIDDLE SCHOOL

How do you solve x squared +2x-15= 0

Answers

+2x-15=0
+2x=0+15
2x=15
X=15/2
X=15/2 or 7,5
MIDDLE SCHOOL

Which is the better buy? A 12 pack of Pepsi for $3.50 or a 6 pack for $1.80?

Answers

Answer:

The 12 pack.

1.80×2=3.60

6 pack of pepsi is $1.80

12 divided by 6 is 2.

1.80 x 2 is 3.60

If you buy two of the 6 pack pepsis, it would have 12 pack of pepsi but would cost $3.60. If you buy the 12 pack, it would be $3.50 so it would be the 12 packs being the better deal.

*note* I'm stupid so I would probably buy the 6 packs twice ;(

MIDDLE SCHOOL

Find the complement of 13%

Answers

The answer is 90 degrees

Answer:

63⁰

Step-by-step explanation:

Complement = 90 - 30/100 × 90

= 90 - 27

= 63⁰

MIDDLE SCHOOL

a total of $67,000 is to be invested, some bonds and some in certificates of deposit (CDs). If the amount in bonds is to exceed that in CDs by $5,000, how much will be invested in each type of investment ?

Answers

First you have to divide then you have to multiply your answer with the original answer then
COLLEGE

Maximize p=x+2y subject to X+3y<10
3x+. y<6
X>0, y>0

What does p equal

(X,y)=

Answers

From the graph of the constraints, the corner points of the feasibility region are (0, 0), (0, 10/3), (1, 3), (2, 0)

For (0, 0): p = 0 + 2(0) = 0
For (0, 10/3): p = 0 + 2(10/3) = 20/3 = 6.67
For (1, 3): p = 1 + 2(3) = 1 + 6 = 7
For (2, 0): p = 2 + 2(0) = 2

For all the corner points, the maximum is at point (1, 3)

Therefore, solution = (1, 3)
HIGH SCHOOL

Find the quotient. write your answer in standard form 3-i/3+i

Answers

Answer with explanation:

⇒To write a complex number in standard form,having complex number in it's denominator multiply by it's conjugate in numerator and denominator

Used the following identities to solve the complex number in fractional form

→  (a+bi)(a-bi)=a²+b²

→i=√-1,   i²= -1

COLLEGE

Find an equation of a sphere if one of its diameters has endpoints (2, 4, 5) and (6, 8, 9).

Answers

First use distance formula to find radius of sphere:


Next, find center of sphere.
The center is located at midpoint between given endponts.


Finally enter values into general equation of sphere:


HIGH SCHOOL

Explain how to write the rational number 3.21 in the form of the fraction

Answers

The answer is 



3 is the whole. 21 is in the 100ths place so 21/100
MIDDLE SCHOOL

If an airplane’s speed is 300 miles per hour, what is it’s speed in feet per second? A. 60 feet per second B. 440 feet per second C. 26,400 feet per second
D. 1,584,000 feet per second

Answers

Answer:

B. 440 feet per second

Step-by-step explanation:

What you need to do is first convert miles to feet and then hours to seconds. Then you should be able to get the answer

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