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
Lisa [10]
3 years ago
5

2r2 + 3s3 − r2 + 4t2 − r2 if r = −2, s = −3, and t = 5.

Mathematics
2 answers:
dexar [7]3 years ago
7 0

Answer:

19

Step-by-step explanation:

Given the formula:

2r^2 + 3s^3 − r^2 + 4t^2 − r^2  

Replace with these values r = −2, s = −3, and t = 5 and compute the result.

2(-2)^2 + 3(-3)^3 − (-2)^2 + 4(5)^2 − (-2)^2  =

= 2*4 + 3*(-27) - 4 + 4*25 - 4 =

= 8 - 81 - 4 + 100 - 4 =

= 19

Elza [17]3 years ago
3 0

First, simplify the expression 2r^2 + 3s^3 - r^2 + 4t^2 - r^2. Here you have three terms with r^2, group them in the following way:

2r^2 + 3s^3 - r^2 + 4t^2 - r^2=2r^2-r^2-r^2+3s^3+4t^2=(2r^2-r^2-r^2)+3s^3+4t^2=

=r^2(2-1-1)+3s^3+4t^2=3s^3+4t^2.

Then substitute s=-3 and t=5:

3s^3+4t^2=3\cdot (-3)^3+4\cdot 5^2=3\cdot (-27)+4\cdot 25=-81+100=19.

Answer: 19.

You might be interested in
Can someone help me solve this?
Virty [35]

Answer:

Her brothers pulse rate is 76.

Step-by-step explanation:

95% of 80 is 76. That only means that her brother's pulse rate must be 76 beats per minute.

8 0
2 years ago
The number of apples in a box decreased from 200 to 150. What is the percent decrease of the number of apples int he box? *
ladessa [460]

Answer:

25%

Step-by-step explanation: 50 is 25% of 200

6 0
3 years ago
Read 2 more answers
Need help answering this
makkiz [27]

Answer:

add the 2 equations together

Step-by-step explanation:

i was in class when I heard this so it should be correct

5 0
3 years ago
Help pleas sssssssssssssssss
ivolga24 [154]
It’s B thank you can I plz have brainlist plz
7 0
2 years ago
Read 2 more answers
Miss Conrads art class was painting murals she had four bottles of red paint five bottles of green paint for bottles of yellow p
Ksenya-84 [330]

Answer:

she had lots of paint

Step-by-step explanation:

ur welcome boo

8 0
3 years ago
Other questions:
  • The cost of a product has been increasing each year.
    8·1 answer
  • Mika has completed 5 birdhouses that is 25% of the number of birdhouses she wants to build
    11·1 answer
  • If tan 72=12/X find X
    11·2 answers
  • What number is 120% of 80
    11·1 answer
  • If h = 18 in. and r = 6 in., what is the volume of the cone shown below? Use 3.14 for pi.
    10·2 answers
  • Which is longer, 1/4 of line A or 1/4 of line B? Explain.
    10·1 answer
  • Find the volume of the cylinder
    13·1 answer
  • Answers? Please helpppppop I don’t need number one only the rest
    6·1 answer
  • What is the equation of the line that passes through the point (6,3) and has a slope of -1/3
    13·1 answer
  • Anthony buys a bag of oranges for $5.79. He pays with a $10 bill.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!