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
ElenaW [278]
3 years ago
9

Find all real square roots of −81 .

Mathematics
1 answer:
Lilit [14]3 years ago
3 0
There are no real roots for a negative number, so -81 has no real roots, if the number is 81 however, then the tow roots are 9
You might be interested in
16.415 rounded to the nearest tenth is 16.4.
jeka94

Answer:

false

Step-by-step explanation: the answer is 20

4 0
3 years ago
Math 9. please help, and show work :)
galina1969 [7]
3.5 cm from the centre
8 0
3 years ago
Em um triangulo ABC,a medida do angulo BAC excede a medida de ABC em 10°,e a medida do amgulo ACB,adicionada de 30°,é igual ao d
Scorpion4ik [409]
the question in English is

<span>In a triangle ABC, the measure of the BAC angle exceeds the ABC measure by 10 °, and the measure of the ACB angle, added by 30 °, is equal to twice the BAC measure. What are the measures of the angles of this triangle?
</span>
Let 
A=m ∠BAC
B=m∠ABC
C=m∠ACB

we know that
A+B+C=180-----> equation 1
A=B+10-----> B=A-10------> equation 2
C+30=2A----> C=2A-30----> equation 3

substitute equation 2 and equation 3 in equation 1
A+[A-10]+2A-30]=180------> 4A=180+40-----> A=220/4-----> A=55°
B=A-10----> B=55-10-----> B=45°
C=2A-30-----> C=2*55-30----> C=80°

the answer is
m ∠BAC is 55°
m∠ABC is 45°
m∠ACB is 80°

<span>the answer in Portuguese

</span><span>Deixei
</span>A=m ∠BAC
B=m∠ABC
C=m∠ACB

<span>nós sabemos isso
</span>A+B+C=180-----> <span>equação 1
</span>A=B+10-----> B=A-10------> equação 2
C+30=2A----> C=2A-30----> equação 3

substitute equação 2 e equação 3 dentro equação 1
A+[A-10]+2A-30]=180------> 4A=180+40-----> A=220/4-----> A=55°
B=A-10----> B=55-10-----> B=45°
C=2A-30-----> C=2*55-30----> C=80°

<span>a resposta é
</span>m ∠BAC is 55°
m∠ABC is 45°
m∠ACB is 80°

4 0
3 years ago
Deborah bought a computer for 25% off the list price. If the list price is $2,428, how much did Deborah spend?
kow [346]
It is
607 because 607x4 is 2,428
5 0
3 years ago
Read 2 more answers
Giving brainliest for the right answer
oksano4ka [1.4K]
I think the answer is $1,760 so sorry if i’m wrong :/
6 0
3 years ago
Read 2 more answers
Other questions:
  • What is nine divided by five and one fourths
    15·2 answers
  • -x+3y=10 <br><br> find x and y intercept
    14·1 answer
  • Eddie needs 2 2/3 cups of flour for one batch of pancakes. How much flour does he need for 2 1/2 batches?
    6·2 answers
  • Which survey is biased?
    7·2 answers
  • Assume that the Poisson distribution applies and that the mean number of aircraft accidents is 9 per month. Find​ P(0), the prob
    12·1 answer
  • Find the area of the circle. Leave your answer in terms of π.
    10·2 answers
  • You buy 8 rose bushes and 15 daylilies for $193. Your friend buys 3 rose bushes and 15 daylilies for $117. Find the cost of each
    13·1 answer
  • The circle graph shows the results of a survey in which 250 students were asked to choose their favorite color. How many more st
    10·1 answer
  • The driving distance from Los Angeles to a Chicago is 2,054 mi. The distance from Chicago to Boston is 983 mi. About how many mi
    6·1 answer
  • I typically give 12% of money I receive to my church. My uncle died recently and left me some money. I donated $408 to my church
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!