MATHEMATICS
MIDDLE SCHOOL

Answer: 1. 40 tens regroup to tens

40 tens = 40 x 10, because it says 40 tens

so how many tens are there in 400

=> 400 divided by 10

=> 400 / 10

=> 40

Thus, we will regroup 40, by tens 4 times to get the answer

=> 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10

There are 40 10s in 40 tens

Thus the answer when we add this 40 tens is 400

40 tens = 40 x 10, because it says 40 tens

so how many tens are there in 400

=> 400 divided by 10

=> 400 / 10

=> 40

Thus, we will regroup 40, by tens 4 times to get the answer

=> 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10

There are 40 10s in 40 tens

Thus the answer when we add this 40 tens is 400

HIGH SCHOOL

gapeach69 4. what is the number written in standard notation? 5 x 10^3 a) 500 b) 5,000 c) 50^3 d) 150

MIDDLE SCHOOL

A garden hose fills a 2-gallon bucket in 5 seconds. The number of gallons, g, is proportional to the number of seconds, t, that the water is running.

Which equation represents the relationship between g and t? Select all that apply.

A. g = 0.4t

B. t = 0.4g

C. g = 2.5t

D. t = 2.5g

E. g = 25t

Answer:

The equations and represents the correct relationship. Hence, options (A) and (C) are correct.

Step-by-step explanation:

Given:

The number of gallons is g .

Time taken is t.

Since, time taken to fill 2-gallon bucket is 5 seconds. Which means,

5 seconds taken = To fill 2-gallon bucket

or

To fill 2-gallon bucket = 5 seconds is taken

Thus, equations and represents the correct relationship.

For more details, refer the link:

brainly.com/question/24085666?referrer=searchResults

The filling rate is 2/5=0.4 gallons per second. So the appropriate equation is A.

HIGH SCHOOL

A rectangular garden shares one side with one side of a house. An adjacent side of the garden is eight feet long. If the area of the garden is 184 square feet, what is the length, in feet, of the common side?

Answer:

Area/width = length

184/8 = 23

length = 23 feet

Answer:

23

Step-by-step explanation:

MIDDLE SCHOOL

saroj bought 40 books for Rs 1600. If he sold 10 books for Rs 40 each and remains book for rs 45 whatcis the total profit or loss

Answer: Rs 150 profit.

Step-by-step explanation: if 10 books went for Rs 40 each, you multiply 10 by 40 to get Rs 400. Then you subtract 10 books from 40 books to get 30 books which were the remaining ones that went for Rs 45 each. You then have to multiply 30 by 45 to get Rs 1350 for 30 books which you will then add to Rs 400 to get Rs 1750 which was the total amount of money all the books went for. You can now then subtract Rs 1600 from Rs 1750 to get Rs 150 which was the profit made.

MIDDLE SCHOOL

Solve for t. 19=12gt2

A. t=76g‾‾‾√

B. t=g76‾‾‾√

C. t=(38g)2

D. t=38g‾‾‾√

Answer: >____(38g/g

Step-by-step explanation:

Step-by-step explanation:

HIGH SCHOOL

Ethan wants to recreate the story of the rice and the chessboard, but he only has a mancala board (which has 1414 spaces). If he puts 11 grain of rice in the first space of the mancala board, 22 on the second, 44 on the third, and so on, doubling the amount for each space, how many total grains of rice will be on the board?

Answer: 16,383

Step-by-step explanation:

According to the question,

The total spaces a mancala board = 14

In the first space, number of grain of rice = 1

In second space number of grain of rice = 2

In third space number of grain of rice = 4

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

_ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ So on,

Thus, We obtained a GP,

1 , 2, 4, 8, -----------

Where total number of terms, n= 14

First term, a = 1, Common ratio, r = 2

Thus, the sum of the above GP,

Thus, The total numbers of grain of rice in the board = 16,383

COLLEGE

A genetic experiment with peas resulted in one sample of offspring that consisted of 429 green peas and 159 yellow peas. a. Construct a 95% confidence interval to estimate of the percentage of yellow peas. b. It was expected that 25% of the offspring peas would be yellow. Given that the percentage of offspring yellow peas is not 25%, do the results contradict expectations? a. Construct a 95% confidence interval. Express the percentages in decimal form.

Answer with explanation:

Null hypothesis :

Alternative hypothesis :

Given : A genetic experiment with peas resulted in one sample of offspring that consisted of 429 green peas and 159 yellow peas.

i.e.

For 95% level of confidence, significance level :

Critical value of z =

Confidence interval for population proportion :

Since 0.25 is not contained in the confidence interval , it means is not reasonable that the true proportion is 0.25 (25%).

Thus, the results contradicts the expectations.

MIDDLE SCHOOL

Which expression is equivlent to (3^2)^-2?

A) -81

B) -12

C) 1/81

D) 1/12

Answer:

Answer: 1/81

First you simplify it to 3^-4

Then express it with a positive exponent

which goes to 1/3^4

Then evaluate it to 1/81

Answer:

C) 1/81

Step-by-step explanation:

According to PEMDAS, you need to work on Parentheses first, so you should square 3.

3×3 = 9

A rule of exponents is that you can't have negative exponents, and if they show up you need to flip the side the exponent is at. (If it were at the denominator it would then have to be at the numerator)

Since the negative exponent was at (what is understood as) the numerator, you have to place it at the denominator.

Your equation should now be

1/ 9^2

Square 9

And the answer should be

1/81

HIGH SCHOOL

How many solutions does the system have?

{y=−3x+5

{y=x^2−3x+5

Hello here is a solution :

y= -3x+5 ...(1)

y = x² -3x+5 ... ( 2 )

-3x+5 = x² -3x+5

x² =0

x=0

y= -3(0)+5 = 5

the system have one solution (0;5)

y= -3x+5 ...(1)

y = x² -3x+5 ... ( 2 )

-3x+5 = x² -3x+5

x² =0

x=0

y= -3(0)+5 = 5

the system have one solution (0;5)