1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
marysya [2.9K]
3 years ago
15

I need help on question 7 and 8

Mathematics
1 answer:
DanielleElmas [232]3 years ago
4 0
7.
remember
(ab)/(cd)=(a/c)(b/d)
we can split them up
and
(x^m)/(x^n)=x^(m-n)

\frac{27k^5m^8}{4k^3*9m^2}=  \frac{27k^5m^8}{36k^3m^2}=( \frac{27}{36} )( \frac{k^5}{k^3} )( \frac{m^8}{m^2} )=( \frac{3}{4})(k^{5-3})(m^{8-2} )=( \frac{3}{4})(k^2)(m^6 )= \frac{3k^2m^6}{4}



9.

2 to 3
4(x-1)=15
to
4x-1=15
the distribuutive prperty
a(b-c)=ab-ac
what he did was
a(b-c)=ab-c

he did not distribute the 4 to the -1


4(x-1)+3=18
minus 3
4(x-1)=15
distribute  4 to x and -1
4x-4=15
add 4 to both sides
4x=19
divide by 4
x=19/4
You might be interested in
If sine of x equals square root of 2 over 2, what is cos(x) and tan(x)? Explain your steps in complete sentences.
kolbaska11 [484]
Sin x =  square root (2) / 2

In order for us to get for cos x and tan x, first we need to know what 
Hypotenuse, Adjacent, and Opposite sides.

sin x = opposite / hypotenuse.

adjacent = square root (hypotenuse^2 - opposite^2)
adjacent = square root (2^2 - square root(2)^2)
adjacent = square root (4 - 2)
adjacent = square root (2)

cos x = adjacent / hypotenuse
tan x = opposite / adjacent..

cos x = square root (2) / 2
tan x = square root (2) / <span>square root (2)  = 1

So, </span>cos x = square root (2) / 2 and tan x<span> = 1</span>
7 0
4 years ago
How do I find x and y
boyakko [2]
X = 10

to find x -
7x = 8x - 10


180 - 70 = 110
110 = 6y + 20

y = 15
4 0
2 years ago
Read 2 more answers
ANSWER THIS FOR BRAINLIST If my food bill is $13.83 and I left a 2 dollar tip and also payed with a 20 dollar bill how much chan
borishaifa [10]

Answer:

$$$$4.17

Step-by-step explanation:

20-13.83=6,17

6.17-2=4.17

7 0
3 years ago
Read 2 more answers
Complete ☻☺<br><br> z^2 + 9z – 90 = (z – 6)(z +■)<br><br> A.) -15<br> B.) 15<br> C.) 90<br> D.) -9
irina [24]
The answer is B) 15

I hope this helps
4 0
3 years ago
Read 2 more answers
At a particular restaurant, each slider has 200 calories and each mini
AnnyKZ [126]

Answer: 1200= 4s+h

Step-by-step explanation: solve! I don’t know how many equations

5 0
3 years ago
Read 2 more answers
Other questions:
  • 17T 13lb 3oz − 9T 20lb 9oz
    7·1 answer
  • Help ASAP!
    5·1 answer
  • How do i solve this equation x^2-12x+11=0
    8·1 answer
  • How Do I Solve Problem #2 Nobody Has Been Able To Figure It Out. Someone Please Help.
    15·1 answer
  • Since Ramon has 8 liter jug of water and since he fills nine 750 millimeter pitchers with water how much water is left??
    10·1 answer
  • Solve for k:
    6·1 answer
  • Solve the following system.<br><br> y = ()x 2 + 2x - 1 and 3x - y = 1
    12·2 answers
  • A player has 15 hits in 34 times at bat and then gets
    13·1 answer
  • Convert 70000 to standard form​
    8·1 answer
  • (Math Help Quick Lots of points please thanks) 2
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!