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3 years ago

Can someone help me with this math homework please!

Mathematics

2 answers:

UNO [17]3 years ago

6 0

1. C

2.A

3.D

4.B

Here's the answer.

alexira [117]3 years ago

3 0

Answer:

1 C

2 A

3 D

4 B

Step-by-step explanation:

The y-intercept is whenever the graph crossses the y-axis, so the input will always be 0.

When f(x) > 0, that's when the output is greater than 0, so it would be above the x-axis.

The x-intercept is whenever the graph crosses the x-axis, so the output will always be 0.

Hope that helps (●'◡'●)

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Find the area of the circle ! Please help

Oduvanchick [21]

Answer:

Step-by-step explanation:

Area of a circle is pi(radius^2)

the diameter of the given circle is 18km

the radius is half so it’s 9km

A = pi(9^2)

A = 81pi km2

6 0

3 years ago

Can someone teach me how to solve this

Lady bird [3.3K]

28.9

Step-by-step explanation:

Multiply the denominator by the number on the other side. This will give you 28.9 as t. To check your work, divide 28.9/8.5. This will give you 3.4.

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3 years ago

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The bucket containing orange tennis balls and yellow tennis balls from which 5 balls are selected at random, but assume that the

NeX [460]

(1)

Probability that all are yellow = $\frac{7\times6\times5\times4\times3}{16\times15\times14\times13\times12}=0.0048$

Probability that all are orange = $\frac{9\times8\times7\times6\times5}{16\times15\times14\times13\times12}=0.0288$

Sum of the two probabilities = 0048+ 0.0288=0.0336

Thus, the probability that at least one is orange and at least one is yellow = 1-0.0336= 0.9664= 96.64 %

(2) In addition to the above, we eliminate the "1 and 4" cases.

In these cases, any of the 5 can be taken out, so we multiply by 5.

1 yellow + 4 orange = $5\times \frac{(7 \times 9 \times 8 \times 7 \times 6)}{(16 \times 15 \times 14 \times 13 \times12)} = 0.2019$

1 orange + 4 yellow = $5 \times \frac{(9 \times 7\times 6 \times 5 \times 4)}{(16 \times 15\times 14 \times 13 \times 12)} = 0.0721$

Sum of two probabilities = 0.2019+0.0721=0.2740

Now adding 0.0336 to this probability =0.0336+0.2740= 0.3076

Subtracting that from 1.0000 = 1-0.3076=0.6924= 69.24 %

Thus, the probability that, of the 5 balls selected at random, at least two are orange and at least two are yellow= 69.24%

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3 years ago

a jar contains half dollars and quarters. there are 30 coins in all in the jar. the total value of the coins is $8.75. how many

OLEGan [10]

25 quarters because if you set up a system of equations you get x+y=30 since there are x number of half dollars and y number of quarters plus each other is 30. Next equation is .5x+.25y=8.75 half dollar is 50cents while a quarter equals 25 cents and together they have to equal 8.75. Now you eliminate one variable then you add the remaining variable and the amounts together then you divide if you eliminated the x variable your answer is the one you get after you divide. If you eliminate the y variable then you have to plug it then you get your answer. hope this helped
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4 years ago

I WILL GIVE BRAINLIEST

vovikov84 [41]

Answer:

y = -5x - 3

Step-by-step explanation:

To answer this the slope must be clculated first

slope equation:

$\frac{y2-y1}{x2-x1}$

these variables symbolize ordered pairs, and the best part is that you can use any two ordered pairs for this example we can use (-5, 10) and (-3,0)

we'll call the first ordered pair 1 so x1 = -5 and y1 = 10.

the next odered pair is 2 so x2 = -3 and y2 = 0.

With this information layed out we can solve:

$\frac{0-10}{-3-(-5)}$

0 - 10 = -10

-3 - (-5) = 2 --- remember negatives cancel each other out to make a positive

$\frac{-10}{2}$ = -5

the slope of the line is -5. Now the next thing to note is that one of the ordered pair (-3,0) is a y intercept. It's time to introduce the equatione of a line:

y = mx+b

There are other equations that can be used for a line but with the info given this equation best suits the data.

m = slope

y and x = are the ordered pair you can input into the equation to slove

b = the y intercept

So the equation would be:

y = -5x - 3

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3 years ago

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