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
Afina-wow [57]
2 years ago
6

Pls help. I really need lol

Mathematics
1 answer:
Licemer1 [7]2 years ago
8 0

Answer:

3x+9+4x+×

8x+9

Step-by-step explanation:

3x+9+4x+x

( ) to isolate the 9

3x (9) +4x+x

3+4+1=8 then slap on the X which equals to 8×+9

You might be interested in
Use the equation: y = 5x - 4 Write an equation in any form) of a line that passes through the point (-1,7) and is parallel to th
Tju [1.3M]

Answer:

y = 5x + 12

Step-by-step explanation:

Use the formula: y - y1 = m(x - x1)

Plug in all numbers into your equation: y - 7 = 5(x - -1)

Minus with a minus becomes a positive: y - 7 = 5(x + 1)

Distribute:                    y - 7 = 5x + 5

Add 7 to both sides:      +7          +7

Answer: y = 5x + 12

7 0
2 years ago
Si el radio de un circulo es de 3 pulgadas. cual es el area del circulo?<br>​
nata0808 [166]

Answer:

I don’t know

Step-by-step explanation:

4 0
3 years ago
A new medical test provides a false positive result for hepatitis 2% of the time that is a perfectly healthy subject being teste
Oxana [17]
Given that X <span>be the number of subjects who test positive for the disease out of the 30 healthy subjects used for the test.

The probability of success, i.e. the probability that a healthy subject tests positive is given as 2% = 0.02


Part A:

</span><span>The probability that all 30 subjects will appropriately test as not being infected, that is the probability that none of the healthy subjects will test positive is given by:

</span>P(X)={ ^nC_xp^x(1-p)^{n-x}} \\  \\ P(0)={ ^{30}C_0(0.02)^0(1-0.02)^{30-0}} \\  \\ =1(1)(0.98)^{30}=0.5455
<span>

Part B:

The mean of a binomial distribution is given by

</span>\mu=np \\  \\ =30(0.02) \\  \\ =0.6
<span>
The standard deviation is given by:

</span>\sigma=\sqrt{np(1-p)} \\ \\ =\sqrt{30(0.02)(1-0.02)} \\ \\ =\sqrt{30(0.02)(0.98)}=\sqrt{0.588} \\  \\ =0.7668
<span>

Part C:

This test will not be a trusted test in the field of medicine as it has a standard deviation higher than the mean. The testing method will not be consistent in determining the infection of hepatitis.</span>
5 0
3 years ago
Find the number to sides of a regular polygon if the sum of the interior angles are 7560
Stels [109]
Use S=(n-2)180 
S is the sum and N is the number of sides
If you know that the sum is 7560 then plug that in for S
7560=(n-2)180
Then solve for n
7560=180n-360 (note I used distributive property)
7560+360=180n
7920=180n
7920/180=n
n=44 sides
I hope this helps :)
6 0
3 years ago
Please help me to find area of semicircle
mojhsa [17]

Answer:

Use a calculator and use the formula 1/2 × pi × (radius squared)

5 0
3 years ago
Other questions:
  • Pentagon CRAFT has coordinates c(-2,1) r(-5,2) a(-6,7) f(-3,9) and t(-1,6) and is dilated by a scale factor of 2/3 at the origin
    12·1 answer
  • What is the value of x?
    9·2 answers
  • 25386 to the nearest 1000
    6·2 answers
  • F(x) =2x^2+4x+5<br> Find: f(a)
    10·1 answer
  • If f(x)=(2x^2)-1, find:<br> -f(3x-1)+2
    12·2 answers
  • The radius of a birthday cake is 5 inches. Icing will decorate the top edge of the cake.
    11·1 answer
  • Find the volume of the prism. round to the nearest tenth
    5·1 answer
  • valentina spends 20% of her weekly income on rent. if her rent is $160 each week find her weekly income
    12·2 answers
  • Doug has Ran 2 miles on his own and he expects to run 1 mile during each track practice how many miles would Doug have to run 34
    11·1 answer
  • What is the slope of the line that passes through the given points: (-2,8) and (4,6)?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!