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4 years ago

8TH GRADE MATH! You dont have to explain it if you dont want to :> but i fr need help

Mathematics

1 answer:

slavikrds [6]4 years ago

6 0

i originally wrote something here but i think it was wrong and idk how to delete an answer i wrote oof

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the ratio of students to laptops in a school is 3:2 if there are 1,200 students, how many laptops are there?

Artemon [7]

Answer:

1200:800

Step-by-step explanation:

1200÷3=400

400×2=800

800 laptops

8 0

3 years ago

Read 2 more answers

A person driving her car at 12.5 m/s approaches an intersection just as the traffic light turns yellow. She knows that the yello

Tems11 [23]

She should try to stop the car.

We will discuss the possibilities of trying to stop and trying to speed up in 2s and find the distance she travels to get into a conclusion.

If she try to stop, then the acceleration, a = -5.8 m/s²

Initial velocity, v₀ = 12.5 m/s

Final velocity, v₁ = 0 m/s [Since the car is stopped]

Let d be the distance the car travels before stopping.

Then, we have, v₁² = v₀² + 2ad

Therefore, d = v₁²-v₀²/2a

= 0-(12.5)²/2 x (-5.8)

= 156.25/11.6

= 13.47 m

So she can stop in time as she is 28m far from the beginning of the intersection.

If she try to speed up, then the acceleration of the car, a = 3.5 m/s²

Initial velocity of the car, v₀ = 12.5 m/s

Time she have, t = 2 s

Let d be the distance the car travels in 2 s.

Then, d = v₀t +(1/2)at²

= 12.5 x 2 + (1/2) x 3.5 x 2²

= 25 + 7

= 32 m

She is 28 m before the beginning of the intersection which is 15 m wide. So if she speed up she will be in the middle of the intersection when the light turns red and may have to stop.

Hence as a legal driver, she should try to stop the car.

Learn more about acceleration at brainly.com/question/605631

#SPJ1

8 0

1 year ago

Kendra bought a magazine for $3 and four paperback books for $5 each the expression 3 + 4 x 5 represents the total cost in dolla

Elodia [21]

I´m pretty sure that the terms would just be 3, 4, and 5. It depends what kind of problem it is.

3 0

3 years ago

A bank advertises that it compounds money quarterly and that it will take Double your money in 10 years. what is the interest-ra

S_A_V [24]

The interest rate is 6.992%, if a bank advertises that it compounds money quarterly and that it will take Double your money in 10 years.

Step-by-step explanation:

The given is,

Compounds money quarterly

Double your money in 10 years

Step:1

Formula to calculate future investment with compounded quarterly,

$A =P(1+\frac{r}{n} )^{nt}$ ...............................(1)

Where, A - Future amount

P - Initial investment\

r - Rate of interest

n - No. of compounding in a year

t - No. of years

Step:2

Let, P = X

A = 2X ( Double your money )

From given, n - 4 ( for compounding quarterly )

t - 10 years

From equation (1)

$2X =X(1+\frac{r}{4} )^{(4)(10)}$

$\frac{2X}{X} =(1+\frac{r}{4} )^{(4)(10)}$

$2 =(1+\frac{r}{4} )^{40}$

Take root $40^{th}$ root on both side,

$\sqrt[40]{2} = (1+\frac{r}{4} )$

$1.017479692 = (\frac{4+r}{4} )$

$(1.017479692)(4) = (r+4)$

$4.06992=(r+4)$

$r = 4.06992 -4$

$r =( 0.06992)(100)$

r = 6.992 %

Result:

The interest rate is 6.992%, if a bank advertises that it compounds money quarterly and that it will take Double your money in 10 years.

3 0

3 years ago

2x + 11 + 6x<br> Combing like terms

Nataly [62]

Answer:8x+11

Step-by-step explanation:2 x+ 6x=8x +11

add 2x to 6x and add 11 to it .

8 0

3 years ago

Read 2 more answers