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3 years ago

14

What is an equivalent expression for 7times plus 56.

2 answers:

Travka [436]3 years ago

8 0

Ifs you could put it in a easier statement than that would be easier like 7x + 56
Anyway, here is the answer.
7(x + 2³)

krok68 [10]3 years ago

7 0

<em>t would be 8 if you are multiplying .</em>

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he books in a private library are classified as fiction and nonfiction. There are 400 books in the library. There are 40 more fi

vfiekz [6]

First, you have to set a system of equations to determine the number of fiction and of nonfiction books.Call f the number of fiction books and n the number of nonfiction books. Then 400 = f + n. And f = n + 40 => n = f - 40 => 400 = f + f - 40 => 400 - 40 = 2f => f = 360 / 2 = 180. Now to find the probability of picking two fiction books, take into account the the Audrey will pick from 180 fiction books out of 400, and Ryan will pick from 179 fiction books out of 399, so the probability will be<span> (180/ 400) * (179/399) = 0.20 (rounded to two decimals). Answer: 0.20</span>

3 0

3 years ago

Angus has $3,000 he want to invest. What interest rate compounded continuously does an account need to offer so that Angus has $

kaheart [24]

Answer:

The interest rate is 7.58%

Step-by-step explanation:

Compound continuous interest can be calculated using the formula:

A = P $e^{rt}$ , where

A is the future value of the investment, including interest

P is the principal investment amount (the initial amount)

r is the interest rate in decimal

t is the time the money is invested for

∵ Angus has $3,000 he want to invest

∴ P = 3000

∵ The interest rate is compounded continuously

∵ Angus has $5,500 in 8 years

∴ A = 5500

∴ t = 8

→ Substitute them in the rule above to find r

∵ 5500 = 3000 $e^{8r}$

→ Divide both sides by 3000

∴ $\frac{11}{6}$ = $e^{8r}$

→ Insert ㏑ in both sides

∵ ㏑( $\frac{11}{6}$ ) = ㏑( $e^{8r}$ )

→ Remember ㏑( $e^{n}$ ) = n

∴ ㏑( $\frac{11}{6}$ ) = 8r

→ Divide both sides by 8

∴ 0.07576697545 = r

→ Multiply it by 100% to change it to a percentage

∴ r = 0.07576697545 × 100%

∴ r = 7.576697545 %

→ Round it to the nearest hundredth

∴ r ≅ 7.58

∴ The interest rate is 7.58%

3 0

2 years ago

Inductive Reasoning, help please :)

IgorLugansk [536]

Step-by-step explanation:

it may help you to understand

5 0

3 years ago

G(r)=-(r+11)(r+14) <br><br>what are the zeros & what is the vertex

Nitella [24]

Answer:

The roots (r) or the Zeros ( other name ) = -11 and -14

Step-by-step explanation:

Post in comments if u need step by step and Ill give to u :)

7 0

3 years ago

HELP PLEASE!!!!!! Find the speed of an athlete who makes 4and3/4 laps in 3mins45 seconds on a 400m field in m/s

Rom4ik [11]

Given:

An athlete who makes $4\dfrac{3}{4}$ laps in 3 mins 45 seconds on a 400m field.

To find:

The speed of the athlete in m/s.

Solution:

We know that,

Distance covered in 1 lap = 400 m

Distance covered in $4\dfrac{3}{4}$ laps = $4\dfrac{3}{4}\times 400$ m

= $\dfrac{19}{4}\times 400$ m

= $1900$ m

We know that,

1 minute = 60 seconds

3 minutes = 180 seconds

3 minutes 45 second = 180 + 45 seconds

= 225 second

The speed of the athlete is:

$Speed=\dfrac{Distance}{Time}$

$Speed=\dfrac{1900}{225}$

$Speed\approx 8.44$

Therefore, the speed of the athlete is about 8.44 m/s.

7 0

2 years ago