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
Marrrta [24]
3 years ago
15

Math is annoying! Can someone help me please?

Mathematics
1 answer:
lord [1]3 years ago
4 0
16.  would be C since they both consist of the same variable to the same power

17. x-2x+7-9+4x
     c. 3x-2
18. -4(3a-5). You would multiply -4 by 3 a, and -4 by -5. It turns to
      -4(3a)-4(-5)
     a. -12a+20
You might be interested in
Stu trained for a triathlon for 5 hours yesterday. He ran 5 miles and then biked 80 miles. His biking speed is 15 mph faster tha
lara31 [8.8K]

Answer:

Step-by-step explanation:

Given as :

The distance cover while running = D_1 = 5 miles

Let The speed for running = S_1

The distance cover with bike = D_2 = 80 miles

The speed for biking = S_2 = 15 mph +  S_1

Total Time taken = 5 hours

Now Time = \dfrac{\textrm Distance}{\textrm Speed}

∴ 5 hour = \frac{D_1}{S_1} +  \frac{D_2}{S_2}

Or,  5 hour = \frac{5}{S_1} +  \frac{80}{15+S_1}

Or, 5 hour = \frac{75 + 5 S_1 + 80 S_1}{S_1(15+S_1)}

or,  5 × (S_1^{2}+15 S_1) = 85 S_1 + 75

Or, 5 S_1^{2} + 75 S_1 -  85 S_1 - 75 = 0

or, 5 S_1^{2} -10 S_1 - 75 = 0

or,   S_1^{2} -2 S_1 - 15 = 0

Or, S_1^{2} -3 S_1 + 5 S_1- 15 = 0

Or, S_1 (S_1 - 3) + 5 (S_1 - 3) = 0

Or, (S_1 - 3) ( S_1 + 5 ) = 0

∴ S_1 = 3 , - 5

So, the running speed = 3 mile per hour

And the biking speed = 15 mph + 3 mph = 18 mile per hour

Hence The running speed of Stu is 3 mile per hour  .  Answer

7 0
3 years ago
The equation y = kx represents a proportional relationship between x and y, where k is the constant of proportionality. For a mo
valentinak56 [21]

Answer:

Step-by-step explanation:

y = kx represents a proportional relationship between x and y

where,

k is the constant of proportionality

Given:

d = st

Where,

d = distance

s = speed

t = time

The constant of proportionality of the quantities d, s and t is speed(s)

Speed(s) remains constant at a given time and distance

The equation can be written in different forms below:

d = st

S = d/t

t = d/s

Real world example of proportional relationships

• F=ma

Where,

F=Force

m=mass

a=acceleration

F=ma is used to calculate force

3 0
3 years ago
A conservation biologist is observing a population of mule deer being affected by an unknown virus. Initially there were 125 ind
kondaur [170]
P=125(1-0.04)^n
..............
5 0
2 years ago
In a big garden 60% of the trees are coconut trees,25%of the number of coconut trees are mango trees and 20% of the number ofof
AVprozaik [17]
<span>the number of trees in the garden = x
</span><span>coconut trees = 0.6x
</span><span>mango trees = 0.6x * 0.25 = 0.15x
</span><span>apple trees = 0.15x * 0.2 = 0.03x


0.03x = 1500
x = 1500/0.03
x = 50 000   </span>← <span>the number of trees in the garden.</span>
3 0
3 years ago
LOAD OF QUESTIONS:
Law Incorporation [45]

the end behavior of the function f(x)

the function f(x) must has odd number of roots ( where the graph of a function intersects the x-axis

the width cant be negative so the width of the rectangle would be 8 inches

4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the set solution for |y-9|≤12?
    9·1 answer
  • Find the amount of change and the percent of decrease in the number of Hurricanes from 2008 to 2009 and from 2010 to 2011. Compa
    5·1 answer
  • Write the statement below as a bicondtional.
    10·2 answers
  • The price of a bracelet was decreased by 30% to £63. <br> What was the price before the decrease?
    11·1 answer
  • Six cakes cost £1.80 how much do ten cakes cost
    9·2 answers
  • if she could have run 400 meters at the same rate as she ran 100 meters, would she have broken the record? Find the difference b
    8·1 answer
  • What do you add to 4 4/9 to make 8
    11·1 answer
  • Help i need two more then im donneee
    6·1 answer
  • The line of sight from a small boat to the light at the top of a 35-foot lighthouse built on a cliff 25 feet above the water mak
    8·2 answers
  • Which best describes the error in finding the area of the triangle?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!