On a spinner:
P(3) = 3/8 and the p(4) = 1/3
what is the probability of getting a 3 or 4

Answers

Answer 1

Answer: add the probabilities
3/8+1/3=9/24+8/24=17/24

Answer 2

Answer: p= 1/8 and p=1/12. those are the two probabilities

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Zina solves a system of linear equations by elimination and finds a solution of (2, 2). One of the equations is a + b = 4. What is the other equation?

Answers

a - b = 0 <=== ur other equation

check...
a + b = 4
a - b = 0
--------------add
2a = 4
a = 4/2
a = 2

a - b = 0
2 - b = 0
-b = 0 - 2
-b = -2
b = 2

solution is (2,2)

Find the area of a 45°-45°-90° triangle with a hypotenuse of 24. a. 144 square units c. 99 square units b. 125 square units d. 100 square units

Answers

area=1/2 times base times height

remember that 45-45-90 triangle has sides of x,x and x√2
(legs are measure x and hypotonuse=x√2)

the legs are equal and are also the base and height
find the legs (x=leg)

hypotonuse=24
24=x√2
divide both sides by √2
24/(√2)=leg=base=height

volume=1/2 times base times heigth
V=1/2 times (24/√2) times (24/√2)
V=1/2 times (576/2)
V=576/4
V=144 units^2

answer is A

It takes the Jones family 3 days to travel 1.240 miles. Write and solve a proportion

Answers

Answer:

im going to guess you didn't mean 1.240 miles but 1,240 miles

so we need to find how far they went each day so

1240/3=413 1/3 miles a day

Hope This Helps!!!

Subtract 5X squared+2X -11 from 3X squared +8X -7

Answers

Subtraction of polynomials are done just as normal subtraction, but you can only subtract those with the same variables and exponents. This is shown below:

3x^2 + 8x - 7
- 5x^2 + 2x - 11
----------------------
-2x^2 + 6x + 4

In a circle, the circumference and diameter vary directly. Which of the following equations would allow you to find the diameter of a circle with a circumference of 154 if you know that in a second circle the diameter is 14 when the circumference is 44?