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
insens350 [35]
2 years ago
11

Solve the equation by using square roots. n2-4=77​

Mathematics
1 answer:
Masteriza [31]2 years ago
8 0

Answer:

n=40.5

Step-by-step explanation:

You might be interested in
On a coordinate plane, a line goes through points (negative 3, negative 3) and (0, 3). What is the slope of the line on the grap
NARA [144]

Answer:

2

Step-by-step explanation:

We can find the slope between two points by using

m= (y2-y1)/(x2-x1)

   = (3 - -3)/(0 - -3)

   = (3+3)/(0+3)

   = 6/3

   =2

5 0
3 years ago
Read 2 more answers
A consumer organization estimates that over a​ 1-year period 20​% of cars will need to be repaired​ once, 5​% will need repairs​
gtnhenbr [62]

Answer:

a) 0.5476

b) 0.0676

c) 0.4524

Step-by-step explanation:

Given this information, we can conclude that 74% of the cars won't need any repairs over a 1-year period (100 - 20 - 5 - 1 = 74%). And 26% will need at least 1 repair over a 1-year period.

P(car doesn't need repair) = 0.74

P (car needs repair) = 0.26

If you own two cars, the probability that:

<u>a) Neither will need repair:</u>

We need that car 1 won't need repair AND car 2 won't need repair.

=P(Car 1 doesn't need repair) x P(Car 2 doesn't need repair)

= 0.74 x 0.74 = 0.5476

The probability that neither will need repair is 0.5476.

<u>b) Both will need repair:</u>

We need that car 1 needs repair AND car 2 needs repair.

P(Car 1 needs repair) x P(Car 2 needs repair)

= 0.26 x 0.26 = 0.0676

The probability that both will need repair is 0.0676

<u>c) At least one car will need repair</u>

Car 1 needs repair or Car 2 needs repair or both need repair.

To solve this one, it's easier to use the complement of P(neither needs repair)

1 - P(neither needs repair)

1 - (0.74)(0.74)  = 1 - 0.5476 = 0.4524

The probability that at least one car will need repair is 0.4524

4 0
3 years ago
find the cost of a car using the installment plan if the down payment is $1,500 and the monthly payments are $385 for 4 years, s
Blizzard [7]
Well, if this is assuming there is no tax on the vehicle and it is fully paid off by the end of the payments, an equation can be set up like the following. 385x+1500=C, x being months and C being total cost. 385(12*4)+1500= C, 385(48)+1500=C, 18480+1500=C, 19980=C.
8 0
3 years ago
if 10 is less than a number is multiplied by 3, the result is equal to 2 times the number. What is the number?
olya-2409 [2.1K]
Hello!

We know that

(x - 10) * 3 = 2x

Distribute the 3

3x - 30 = 2x

Subtract 2x from both sides

x - 30 = 0

Add 30 to both sides

x = 30

The answer is 30

Hope this helps!
4 0
3 years ago
Read 2 more answers
Evan runs a website that has gotten quite popular. However, its popularity seems to be decreasing and the site is now getting 7%
anyanavicka [17]

Answer:

(a-b) *(a-b) *(a-b)

=(a*a*a) -3*(a*a*b)+3*(a*b*b)-(b*b*b)

34000*(1-7%)*(1-7%)*(1-7%)

=34000*(1-0.07)*(1-0.07)*(1-0.07)

=34000*[(1*1*1)-3*(1*1*0.07)+3*(1*0.07*0.07)-(0.07*0.07*0.07)]

=34000*(1-0.21+0.0147-0.000343)

=34000*(0.804357)

=34*1000*(804.357/1000)

=34*804.357

=<u>27348.138</u>

<u>=</u><u>27348</u>

4 0
3 years ago
Other questions:
  • Solve for h: a = 1/2bh<br><br> h = A over 2b<br> h = A/b (1 /2)<br> h = 2Ab<br> h = 2A/b
    13·1 answer
  • Noah has a coupon for 1/4 off socks.If he buys $20.89 in socks, what would his total be with the coupon?
    8·1 answer
  • Sophie has a hard rubber ball whose circumference measures 13 inches. she wants to store it in a box. what is the number of cubi
    12·1 answer
  • 7x + 2y &gt; -5. (1,1)
    10·1 answer
  • What is the range of the relation (-2 ,7), (7 ,2), (2, 7)​
    13·1 answer
  • Solve for x. {x}{3}+2=-13
    9·1 answer
  • The scatter plot and regression line below show the relationship between how early students turned in an exam (measured by minut
    8·2 answers
  • Good Afternoon. I hope you’re well:) I need to understand how to go about solving this without a calculator, please. Thank you s
    13·1 answer
  • Value of x here is ????<br><br><br><img src="https://tex.z-dn.net/?f=30x%20%3D%2015%20%2B%2015" id="TexFormula1" title="30x = 15
    5·2 answers
  • If the slope of a line is 7/10, how much vertical change will be present for a
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!