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
stira [4]
3 years ago
7

Simplify each square root:

Mathematics
1 answer:
STatiana [176]3 years ago
8 0
1.\ \sqrt{-25}-isn't\ real\ number\to\sqrt{-25}=\sqrt{25(-1)}=\sqrt{25}\cdot\sqrt{-1}=5i\\\\2.\ \sqrt{1.44}=\sqrt{1.2^2}=1.2\\\\3.\ \sqrt{\frac{16}{49}}=\frac{\sqrt{16}}{\sqrt{49}}=\frac{\sqrt{4^2}}{\sqrt{7^2}}=\frac{4}{7}\\\\\sqrt{-\frac{16}{49}}=\frac{4}{7}i\\\\4.\ \sqrt{361}=\sqrt{19^2}=19\\\\5.\ \sqrt{49}=\sqrt{7^2}=7\\\\6.\ \sqrt{0.64}=\sqrt{0.8^2}=0.8\\\\\sqrt{-0.64}=0.8i

7.\ \sqrt{-6.25}=\sqrt{6.25(-1)}=\sqrt{6.25}\cdot\sqrt{-1}=\sqrt{2.5^2}\cdot\sqty{-1}=2.5i\\\\8.\ \sqrt\frac{169}{196}=\frac{\sqrt{169}}{\sqrt{196}}=\frac{\sqrt{13^2}}{\sqrt{14^2}}=\frac{13}{14}\\\\9.\ \sqrt\frac{25}{324}=\frac{\sqrt{25}}{\sqrt{324}}=\frac{\sqrt{5^2}}{\sqrt{18^2}}=\frac{5}{18}\\====================================

i=\sqrt{-1}\ is\ the\ imaginary\ unit\\---------------------\\If\ a\geq0\ then\ \sqrt{a^2}=a
You might be interested in
3t^2+10t+7<br> factor im confused what im doing
mrs_skeptik [129]

Answer:

(3t + 7) (t + 1)

Step-by-step explanation:

3t^2 + 10t + 7

(3t^2 + 3t) (7t+7)

3t (t+1) 7 (t+1)

(3t+7) (t+1)

8 0
3 years ago
A fish tank is in the shape of a cuboid.
zalisa [80]

Answer:

Length = 0.8m

Breadth = 0.3m

Volume = 108litres = 108÷1000 = 0.108m³

Volume = l x b x h

0.108 = 0.8 x 0.3 x h

0.108 ÷ ( 0.8 x 0.3 ) = h

0.45 = h

6 0
3 years ago
28,18,8,-2 is this arithmetic ?
Tresset [83]

Answer:

yes it is arithmetic because:

28 - 10= 18

18 - 10= 8

8 - 10= -2

it keeps decreasing by the same number (10). Therefore, it is arithmetic.

3 0
3 years ago
The same couple, what is the probability that if they have three children, two will be boys and one will be a
cricket20 [7]
3/8 would be the correct answer.

8 0
3 years ago
The formula d = rt gives the distance traveled in time t at rate r. A bicyclist rides at a
Nesterboy [21]

D = rt

We are given the rate r to be 15 mph.

We are given the time (in hours) to be 3.5.

We need to find D.

D = (15)(3.5)

D = 52.5 miles.

Did you follow?

6 0
3 years ago
Other questions:
  • Is 3.1× 2×9=3.1×2×9 associativr property
    15·1 answer
  • BRAINLIEST ASAP! PLEASE HELP ME :)
    11·1 answer
  • What is the probability of having 3 children that are are all boys
    9·1 answer
  • Given f(x) = 3x^3 + kx + 1, and x – 1 is a factor of f(x), then<br> what is the value of k?
    6·2 answers
  • in 1975 the population of the village was 900 it increased by 30% the following year what was the population of the year 1976​
    8·2 answers
  • What is the product of(5)(3)
    7·1 answer
  • Please help me thank you
    9·2 answers
  • Can someone help me out with this inequality problem?? Will give brainliest to best answer!!
    11·1 answer
  • If you have $15 and you spend $8 on baseball tickets, what fraction of your money did you spend?
    5·1 answer
  • a golf course placed an order of 5075 golf balls if there are 7 balls in each package how many packages did the golf course orde
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!