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mylen [45]
2 years ago
8

30 POINTS! RIGHT ANSWERS ONLY! PLEASE! Thank you, explanation is optional.

Mathematics
2 answers:
Len [333]2 years ago
4 0

Answer:

16+x=30  x=14

Step-by-step explanation:

GaryK [48]2 years ago
3 0

Answer: First question : 14

Second question : x(2x + 3x)

Third Question : 11

Fourth Question : 4/12

Fifth Question : m = 30 x 2w

Step-by-step explanation:

First question : If you add 16 to 14 you get 30 so 14 is X

Second question : I don't know how to explain

Third Question : If you subtract 11 from 25 you get one number lower than 15, the question says < and the smaller number eats the larger number so if you subtract 11 from 25 you get 14 and 14 is smaller than 15

Fourth Question : I'm not good at explaining fractions

Fifth Question : When you get to the 2nd week you have 30, then you basically multiply by 2 from 30 and on the 4th week you get 60

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Problem is in the attached image. Thanks in advance!
lutik1710 [3]

Answer: it will take 2.5 hours for both people to meet after person B leaves.

Step-by-step explanation:

The distance between the house of person A and his cousin's house is 234 miles.

At the point where they meet, they would have travelled 234 miles.

Person A travelled at an average speed of 44 miles per hour.

Let t represent the time spent by Person A in travelling from his house to the point where they meet.

Distance = speed × time

Distance covered by person A would be

44 × t = 44t

One and half hours later, person B leaves his house to visit person A, travelling at an average speed of 62 miles per hour. This means that total time spent by person B in travelling to the point where they meet is (t - 0.5) hours. Distance covered would be

62(t - 0.5) = 62t - 31

Since the total distance covered is 234 miles, then

44t + 62t - 31 = 234

106t = 234 + 31 = 265

t = 265/106 = 2.5 hours

3 0
2 years ago
(2x3z2)3 <br> ------------------ <br> x3y4z2 * (x-4z3)
Komok [63]
The rules of exponents tell you to add exponents in the numerator and subtract those in the denominator. A power of a power causes the exponent to be multiplied.

\dfrac{(2x^{3}z^{2})^{3}}{x^{3}y^{4}z^2x^{-4}z^{3}}=2^{3}x^{(3\cdot3-3-(-4))}y^{-4}z^{(2\cdot3-2-3)}\\\\=\dfrac{8x^{10}z}{y^{4}}
8 0
3 years ago
There are 4 blue marbles, 8 red marbles and 5 green marbles. Write a part to whole ratio comparing green marbles.
fredd [130]

Answer:

5:17

Step-by-step explanation:

there are 17 total marbles and 5 that are green. The part is 5 and the whole is 17.

4 0
2 years ago
Read 2 more answers
Solving systems equations by elimination
pishuonlain [190]
I won't answer them all for you (don't want to cheat - need to learn something).
But for the first one given:

<span>-2x-9y=-25
-4x-9y=-23

you set up either x or y (which ever one you want to eliminate) so that one of them cancels.
So this one is easy - you just have to multiply an entire row by negative (doesn't matter which one) - so that the y's will be + and - 

Since they're both 9 and they're subracting NOW - you can eliminate the y value. Now add/subtract the x's. So it'd be -2 or 2 depending on how you eliminated y. Then add the number outside of the = sign. Now just solve for x. After that plug in whatever you got for x into both of the rows. Then find the y value.

Hopefully this wasn't confusing -- reply if it is and I will try to simplify. I can give you contact if you need help with the rest 

Good luck!</span>
3 0
2 years ago
Solve by using factorizing method:4x²-36x+81=0​
boyakko [2]

Answer:

  • x = 4.5

Step-by-step explanation:

  • 4x² - 36x + 81 = 0​
  • (2x)² - 2*2x*9 + 9² = 0           Identity  a² - 2ab + b² = (a - b)²
  • (2x - 9)² = 0
  • 2x - 9 = 0
  • 2x = 9
  • x = 4.5

8 0
2 years ago
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