All categories

2 years ago

2. Simplify the expression. (x3)(x7)² 1 x18 x14 x126

Mathematics

1 answer:

lisabon 2012 [21]2 years ago

4 0

Step-by-step explanation:

$= ( {x}^{3} ) { ({x}^{7} )}^{2}$

$= {x}^{3} \times {x}^{7 \times 2}$

$= {x}^{3} \times {x}^{14}$

$= {x}^{3 + 14}$

$= {x}^{17}$

You might be interested in

I need help with this i cant cuaet understand this.

dmitriy555 [2]

Answer:

CANNOT SEE CLEARLY

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

7. Evaluate 255 - 255-15-15 225

Lerok [7]

Answer:

y=98

Step-by-step explanation:

7 0

3 years ago

One month ruby worked 8 hours more than Issac,and Shetland worked 4 times as many hours as ruby. Together they worked 136 hours.

Natalka [10]

R=number of hours ruby worked
i=number of hours issac worked
s=number of hours shetland worked

ruby worked 8 more than issac
r=8+i

shetland worked 4 times as many as ruby
s=4r

total they worked 136
r+i+s=136

so

we gots
r=8+i
s=4r

for r=8+i
solve for i
minus 8 both sides
r-8=i

so

r+i+s=136
subsitute r-8 for i and 4r for s
r+r-8+4r=136
6r-8=136
add 8 to both sides
6r=144
divide both sides by 6
r=24

sub back

r-8=i
24-8=i
16=i

s=4r
s=4(24)
s=96

ruby worked 24 hours
issac worked 16 hours
shetland worked 96 hours

4 0

3 years ago

It takes Peter 4 hours to walk 12 miles.If he continues to walk at the same rate, how long will it take him to walk:

blondinia [14]

Answer:

a]2.3 hrs

b]3.6hrs

Step-by-step explanation:

4hrs = 12 miles

x = 7miles

4 x 7=28/12=2.3

4 x 11=44/12=3.6hrs

6 0

4 years ago

Read 2 more answers

Does anyone know this answer??

xxMikexx [17]

I believe by the first equation they are referring two a representation of the total amount of money made up by the two types of coins. I found this to be 0.05x + 0.10y = 3.50

In my work I solved for the amount of each coin- I assume this is what the final step of your problem entails. If you need any help understanding/ I misinterpreted something please feel free to comment and ask :)

#5c coins or x= 36

#10c coins or y= 17

4 0

2 years ago