MATHEMATICS MIDDLE SCHOOL

Round 425 to the nearest ten and to nearest hundred 430; 400

420; 500

430; 500

420; 400

Answers

Answer 1

Answer:

Answer:

430;400

Step-by-step explanation:

So tenth is the 2.. 5 makes it go to 3 430

hundred we look to change 4 so we look at tenths 2 is less than 5 so it stays the same 400

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What is 8.57x10-⁴ in standered form ?

Answers

Kaleerain5,

In order to get your answer you must remember that if the exponent is negative move to the left and if the exponent is positive you have to move to the right.

$8.57 * 10^(-4)$
The exponent is negative so move to the left:
$8. = .8 = .08 = .008 = .0008$
$= .000857$

Therefore your answer is ".000857."

Hope this helps!

A dentist was making note of his upcoming appointments with different aged patients and the reasons for their visits.The probability that an appointment is with patients over 60 years old is 0.2, and the probability that it is for a broken tooth is 0.4.
What is the probability that a randomly chosen appointment is with patients over 60 years old or is for a broken tooth if those are independent events?

Answers

Answer:

.08

Step-by-step explanation:

40% of 20% is 8%

3x-4y=-31 x=6-y please help

Answers

Solve x

Substitute -y+6 for x in 3x-4y=-31

3x-4y=-31

3(-y+6)-4y=-31

Simplify both sides of the equation

-7y + 18 = -31

Add -18 to both sides

-7y+18-18=-31-18

7y= -49

Divide both sides by -7

7y/-7= -49/-7

y= 7

Substitute 7 for y in x = -y+6

x= -y+6

x= -7+6

Simplify both sides of the equation

x= -1

Answer : x= -1 and y = 7

I hope that's help and have a great night !

Fresh pond has a population of 854 and it’s increasing by 3 people per year. Strawberry has a population of 427 and it’s increasing by 10 people per year. In how many years will the two villages have the same number of residents?

Answers

Answer:

The number of years that will the two villages have the same number of residents is 61 years

Step-by-step explanation:

Let's assume number of years as 'x'

First Pond:

Fresh pond has a population of 854

and it’s increasing by 3 people per year

so, we can find equation for population of first pound

$P=854+3x$

Second pond:

Strawberry has a population of 427

and it’s increasing by 10 people per year

so, we can find equation for population of first pound

$P=427+10x$

Since, populations are equal

so, we can set both equation equal and then we can solve for x

$P=427+10x=854+3x$

$427+10x=854+3x$

$7x=427$

$x=61$

So,

The number of years that will the two villages have the same number of residents is 61 years

What is the answer ?

Answers

-7y -3y +2 = -8y-8

-10y +2 = -8y-8

-10y +8y = -8 -2

-2y = -10

2y = 10

y = 10/2 = 5

Answer:

y = -5/6

Step-by-step explanation:

7y - 3y + 2 = -8y - 8

12y + 2 = -8

12y = -10

y = -10/12 = -5/6

Jenna lives 4 3/10 miles from school. She estimates that she travels 4×2×5 or 40 miles each week. Is her estimate an overestimate or an underestimate?