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4 years ago

I don't get math and will never get it can u help ?

1 answer:

4 0

Practice is key in mathematics! Always search up the topic and re-read the lessons with some practice problems to see if you got it. Asking your teacher and peers to help is another way to go.

Remember, your teacher had to learn this in order to teach you about it!

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Z varies directly as x and inversely as y.

natta225 [31]

Answer:

y = 6.

Step-by-step explanation:

z = kx/y

9 = k*24/8

24k = 72

k = 3.

So z = 3x/y

When x = 10 and z = 5

5 = 3*10/y

5y = 30

y = 6.

4 0

3 years ago

What percentage of boys ate grapes

qaws [65]

Answer:

40% of the boys ate grapes :)

Thank you

8 0

3 years ago

Read 2 more answers

Given:

lys-0071 [83]

Answer:

$PS=13\text{ units}$

Step-by-step explanation:

So, we know that PR is 20, SR is 11, and QS is 5.

We also know that PQ is perpendicular to QR, forming the right angle at ∠Q.

We know all the side lengths except for PQ and PS (the one we want to find). Notice that if we find PQ first, we can then use the Pythagorean Theorem to find PS since we already know QS.

So, let's find PQ.

We can see that we can also use the Pythagorean Theorem on PQ. PQ, QR, and PR (the hypotenuse) will be our sides. So:

$(PQ)^2+(QR)^2=(PR)^2$

We know that PR is 20.

QR is the combined length of QS+SR, so QR is 5+11 or 16.

So, substitute:

$(PQ)^2+(16)^2=(20)^2$

Solve for PQ. Square:

$(PQ)^2+256=400$

Subtract 256 from both sides:

$(PQ)^2=144$

Take the square root of both sides:

$PQ=12$

So, the side length of PQ is 12.

Now, we can use the Pythagorean Theorem again to find PS. Notice that PQ, QS, and PS also form a right triangle, with PS being the hypotenuse. So:

$(PQ)^2+(QS)^2=(PS)^2$

We already know that QS is 5. We also just determined that PQ is 12. Substitute:

$(12)^2+(5)^2=(PS)^2$

Square:

$144+25=(PS)^2$

Add:

$169=(PS)^2$

Take the square root of both sides:

$PS=13$

Therefore, the length of PS is 13 units.

And we're done!

7 0

3 years ago

How do you this problem it's domain and range

Kaylis [27]

Domain would be the farthest x value to left and the farthest x value to right

Range would be lowest y value to highest y value

8 0

3 years ago

PLEASE HELP!!!<br><br> Consider circle O, where m BD=70 and m CA=170

STALIN [3.7K]

M∠BPD = 130° and mBC + mAD = 100°.

An angle formed by two chords has a measure that is 1/2 the sum of the chords.

Here, we know that arc CA = 170° and arc BD = 70°. That means that the sum of CB and DA is 100°. This also tells us that ∠DPA = 1/2(100) = 50°. Therefore m∠BPD = 180-50 = 130°, since it forms a straight angle with ∠DPA.

5 0

3 years ago

Read 2 more answers