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
ioda
3 years ago
5

Evaluate each expression for a=7,b=4,and c=-3.

Mathematics
1 answer:
stiks02 [169]3 years ago
3 0

Answer:

Step-by-step explanation: 3a-5b= 3(7)-5(4)

                                                       =21-20

                                                       =<u>1</u>

7-3a+5a+15=7-3(7)+5(7)+15

                   =7-21+35+15

                   =-14+50

                   =<u>36</u>

15a^2-17(bc)^2=15(7)^2-17(4)(-3)^2

                         =105^2-204^2

                         =210-408

                         =<u>-198</u>

You might be interested in
1. Use the formula S(d)=√9.8d to calculate the estimated speed, in meters per second, of a tsunami if the disturbance occurred a
postnew [5]

Answer: 1. 210 meters per second .

2.  756  kilometers per hour.

Step-by-step explanation:

Given : The formula S(d)=\sqrt{9.8d} to calculate the estimated speed, in meters per second of a tsunami.

1. If the disturbance occurred at an ocean depth of 4,500 meters.

Then put d= 4500 in the above formula , we get

S(d)=\sqrt{9.8\times4500}

S(d)=\sqrt{44100}=\sqrt{21\times21\times10\times10}\\\\=\sqrt{210^2}=210

Hence, if the disturbance occurred at an ocean depth of 4,500 meters , the estimated speed would be 210 meters per second .

Also, A meter per second is equal to 3.6 kilometers per hour.

i.e. 1 meter per second = 3.6 kilometers per hour

Then by unitary method ,

210 meters per second  =3.6\times210 kilometers per hour

=756  kilometers per hour.

3 0
3 years ago
When you draw a multi-phase sample ____. Group of answer choices
notsponge [240]

Answer:

The correct answer is letter "B": You use information from a first sample for collecting a subsequent subsample for further study.

Explanation:

Multi-phase sampling is a strategy by which a large number of data under study is taken, then a subsample of that pool is taken, and after that, another smaller subsample is taken in an attempt to count with samples that best might represent the whole population. Usually, the process takes collecting two different samples, but it can be applied as many times as necessary.

8 0
3 years ago
What is the quotient of 6,135 and 15
zavuch27 [327]

Answer:

409

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
I Need Help Asappp! So Pls answerrr!
lisabon 2012 [21]

Answer:

y= -3x+6

Step-by-step explanation:

3 0
3 years ago
Can anyone turn 3.25x+6.50y=520 into slope intercept form? pls!
Lynna [10]

Answer:

y=-1/2x+80

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • Which equation is true for the value b= 10?
    8·2 answers
  • Vertex form equation 4(x+2)^2-81 <br>what is the solution?​
    12·1 answer
  • Students in an art class make square tiles that are 5 inches long.They plan to make a row of tiles that is 4 feet 2 inches long.
    10·1 answer
  • What is the base of a parallelogram with an area of 72 square feet and a height of 12 feet?
    15·1 answer
  • Pls help:) (geometry)
    12·1 answer
  • In a bag of candy, there are 2 cinnamon, 1 butterscotch, and 2 peppermints. What is the probability of randomly selecting a pepp
    9·2 answers
  • martha is buying hot dogs and buns for the class barbecue. the hot dogs come in packages of 10. the buns come in packages of 12.
    12·2 answers
  • Find d using a trigonometric ratio
    6·1 answer
  • Round 13,649 to the nearest thousand
    9·1 answer
  • Explain the following in complete sentences:
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!