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3 years ago

Someone please help me!!! HELPPPP ASAPPPP!!!

Mathematics

1 answer:

BartSMP [9]3 years ago

6 0

Answer:

I think it's 6.

Step-by-step explanation:

I think this because b is 62 leaving only 6 to become 68.

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Factor each expression 1. 3n + 9 2. t² + 4t 3. 15 + 20x

Gnom [1K]

1... 3 (n + 3)
2... t (t + 4)
3... 5 (3 + 4x)

The trick to all of these is finding common factors, then taking them out... IT's pretty easy once you get the hang of it.

4 0

3 years ago

Driving to your friend's house, you travel at an average rate of 35 miles per hour. On your way home, you travel at an average r

kenny6666 [7]

Answer:

14 miles

Explanation:

The relation that will be used to solve this problem is:

$Distance = Velocity*Time$

which can be rewritten as:

$Time = \frac{Distance}{Velocity}$

Assume that:

Distance from your house to your friend's house is d

Time taken from your house to your friend's house is t₁

Time taken from your friends house to your house is t₂

1- From your house to your friend's house:

Average rate = 35 miles/hour

Therefore:

$t_{1} = \frac{d}{35}$

2- From your friend's house to your house:

Average rate = 40 miles per hour

Therefore:

$t_{2} = \frac{d}{40}$

3- Round trip:

We know that the round trip took 45 minutes which is equivalent to 0.75 hours

This means that:

t₁ + t₂ = 0.75 hours

$\frac{d}{35}+\frac{d}{40}=0.75\\ \\\frac{40d + 35d}{1400}=0.75\\ \\\frac{75d}{1400}=0.75\\ \\ 1050 = 75d\\ d=14 miles$

Hope this helps :)

3 0

3 years ago

You put $400 in an account. The account earns $18 simple interest in nine months. What is the annual interest rate

chubhunter [2.5K]

Answer:

Step-by-step explanation:

Simple Interest formula:

S.I=P×R×T/100

where

S.I is simple interest

P is principle amount

R is Annual interest rate

T is time period

[usually represented as (number of months)/12]

$18=$400×R/100×9/12

simplify

$18=$3600R/1200

$18=$3R

so R=$18/$3

Therefore,

The Annual Interest Rate is 6%

7 0

3 years ago

If you are going 10.5 mph how long would it take to go 6,776 miles?

faust18 [17]

Answer: 21.

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

One student solved the inequality −4 > x/-7 and got 28 28. Are they both correct? Explain

dusya [7]

Answer: solutions are the same, just written differently, inequality sign is reversed when multiplying by a negative. Yes, both students are correct.Jul 8, 2018

Step-by-step explanation:

8 0

3 years ago