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
Alexandra [31]
3 years ago
10

7th grade math! Help please 6 questions :)

Mathematics
1 answer:
mote1985 [20]3 years ago
7 0

10:    k=5

11:     x=5

12:    m= -4

15:     k=4

16:      z=5

17:      p=4

You might be interested in
If a sports car is traveling at 95 miles per hour, how long would it take the sports car to overtake a family car traveling at 3
levacccp [35]
Distance = speed * time
d = st

The sports car travels d distance for t time at speed, s, 95 mph until it overtakes the family
car.
The equation for the sports car is
d = 95t

The family car travels the same distance, d, but since it left 4.5 hours earlier  than the sports car, it travels for t + 4.5 time until it is overtaken. It travels at speed, 35 mph.
The equation for the family car is
d = 35(t + 4.5)

We solve the two equations as a system of equations.

d = 95t
d = 35(t + 4.5)

Since d = d, set the right sides of the equations above equal to each other.

95t = 35(t + 4.5)

95t = 35t + 157.5

60t = 157.5

t = 2.625

The answer is 2.625 hours, or 2 hours, 37 minutes, and 30 seconds.

Check:
In 2.625 hours, the sports car travels: 95 mph * 2.625 h = 249.375 miles
The family car traveled 2.625 hours plus the extra 4.5 hours, or 7.125 hours.
In 7.125 hours, the family car travels 35 mph * 7.125 h = 249.375 miles.
The cars have traveled the same distance 2.625 hours after the sports car left, so our answer is correct.
3 0
3 years ago
The daily earnings of an employee who works on a commission basis are given by the following probability distribution. Find the
elena-s [515]

Answer: The employee's expected earnings is 78.5.

Step-by-step explanation:

Since we have given that

$   Probability

0         0.07

25       0.12

50       0.17

75       0.14

100     0.28

125      0.18

150     0.04

We need to find the employee's expected earnings.

As we know the formula for "Expectation":

E(x)=0\times 0.07+25\times 0.12+50\times 0.17+75\times 0.14+100\times 0.28+125\times 0.18+150\times 0.04\\\\E(x)=0+3+8.5+10.5+28+22.5+6\\\\E(x)=78.5

Hence, the employee's expected earnings is 78.5.


7 0
3 years ago
S=πr^2+πrl solve for l
Gala2k [10]
S/<span>πr +r =l 
might be -r









</span>
8 0
3 years ago
Solve each problem. Explain or show your reasoning.<br> What is 25% of 160 ?
ExtremeBDS [4]

Answer:

0.25 x 160 = 40. So 40 is 25% of 160

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
I'm having trouble understanding this math problem it's about triangles and my brain doesn't know how to do any of this stuff​
vichka [17]

Answer:

What is it abt area? angles?

5 0
2 years ago
Read 2 more answers
Other questions:
  • What value of x satisfies the system of equations {2x+5y=35x=−10−15y? Enter your answer as the correct value for x, like this: 4
    10·1 answer
  • The scale of a drawing is 1 in : 25 yd. Find the length on the drawing for the actual length: 375 yd
    5·1 answer
  • Whats the answer plesee and thank you!!!!<br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B4%7D%7B9%7D%20%20%3D%20%7B36%7D%7Bn%
    7·1 answer
  • Decide wether the function is one to one y=8x-6
    9·1 answer
  • The graph of y=tan{1/4(x-pi/2)}+2 is shown. What is the period of the function?
    15·1 answer
  • Iliana multiplied 3p – 7 and 2p2 – 3p – 4. Her work is shown in the table.
    9·2 answers
  • Find the measure of the angle indicated
    15·2 answers
  • Solve 5kx + 6 = 7kx for x.
    8·1 answer
  • What is the intercept
    14·1 answer
  • A consumer group wants to know if an automobile insurance company with thousands of customers has an average insurance payout fo
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!