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4 years ago

How do u do 15m-25=9m+17

1 answer:

5 0

You subtract 9 from 15, which is 6m + 25 = 17. Then you add 25 on both sides and then you get.....6m=42. Divide 6 on both sides and you get the answer of 7.

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If you start with a principal amount of $150 and the simple interest rate is 3%. What will the

seraphim [82]

Answer:

principal=$150

Rate =3%

time =3years

then formula to find interest =PTR divide by 100

=150*3*3/100

=13.5

is the correct answer

7 0

3 years ago

Read 2 more answers

At 3:30 p.m., Berto’s train was 34 miles past the egg farm, traveling at an average speed of 85 miles per hour. At the same time

timurjin [86]

E=egg farm

x=distantce between the Berto´s trains and the meeting point.

t=time where the trains meet up

⇒110 miles/h ⇒85miles/h

[---------------------------E----------------------]-------------------------------------X

[............12 miles.......][........34 miles.....][------------ x ----------------------]

distance between Berto´s train and Eduardo´s train=

=12 miles+34 miles=46 miles.

S=d/t ⇒d=S*t

S=seed

d=distance

T=time

Eduardo´s train;

46 miles+x=t*110 miles/h ⇒x=t*110 miles/h-46 miles (1)

Berto´s train;

x=t*85 miles/h (2)

With the equations (1) and (2) we suggest this system equations:

x=t* 110 miles/h-46 miles

x=t*85 miles/h

we solve this system equiations :

t*110 miles/h-46 miles=t*85 miles/h

110t miles/h-85t miles/h=46 miles

25 t miles/h=46 miles

t=46 miles/25 miles/h=1,84 hour (≈1 hour, 50 minutes, 24 seconds)

x=t*85 miles/h=156,4 miles

Solution: 1,84 hour

3 0

3 years ago

Read 2 more answers

What is 4 3/4 + 7/8 showing all work

Mekhanik [1.2K]

$4 \frac{3}{4} + \frac{7}{8}$

Convert mixed numbers to improper fractions

$= \frac{19}{4} + \frac{7}{8}$

Find de LCD for 4 and 8 :

Factor each denominator into its primes:

$4 = 2^2
$

$8 = 2^3$

Find the least common denominator $2^3 = 8$

Adjust fractions based on the LCD :

$\frac{19*2}{8} + \frac{7}{8}$

Since the denominators are equal , combine the fractions:

$\frac{2*19+7}{8}$

$\frac{38+7}{8}$

$= \frac{45}{8}$

Therefore:

Convert improper fractions to mixed numbers

$= 5 \frac{5}{8}$

hope this helps!

7 0

3 years ago

The mean of the data is 18.25 find the variance

bogdanovich [222]

Variance= 4.2
Standard deviation = 2.12

5 0

3 years ago

Read 2 more answers

If -12-4(-2x)= 4 then what is x?

11111nata11111 [884]

Answer:

$\boxed{\boxed{\sf x=2}}$