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liq [111]
3 years ago
9

Please help me idk this

Mathematics
1 answer:
GarryVolchara [31]3 years ago
6 0

Answer:

<h2>h = 18 cm</h2>

Step-by-step explanation:

A=\dfrac{bh}{2}\\\\A=117\ cm^2\\b=13\ cm

Substitute:

117=\dfrac{13h}{2}               <em>multiply both sides by 2</em>

234=13h            <em>divide both sides by 13</em>

18=h\to h=18\ cm

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in the figure below trianglePQM and triangleQRP are right triangles. the measure of lineQM is 6 and the measure of lineQP is 8.
Kipish [7]

Answer:

Option 4 is correct. The length of PR is 6.4 units.

Step-by-step explanation:

From the given figure it is noticed that the triangle PQR and triangle MQR.

Let the length of PR be x.

Pythagoras formula

hypotenuse^2=base^2+perpendicular^2

Use pythagoras formula for triangle PQM.

PM^2=QM^2+PQ^2

PM^2=(6)^2+(8)^2

PM^2=36+64

PM^2=100

PM=10

The value of PM is 10. The length of PR is x, so the length of MR is (10-x).

Use pythagoras formula for triangle PQR.

PQ^2=QR^2+PR^2

(8)^2=QR^2+x^2

64-x^2=QR^2                   .....(1)

Use pythagoras formula for triangle MQR.

MQ^2=QR^2+MR^2

(6)^2=QR^2+(10-x)^2

36=QR^2+x^2-20x+100

36-x^2+20x-100=QR^2        .... (2)

From equation (1) and (2) we get

36-x^2+20x-100=64-x^2

20x-64=64

20x=128

x=6.4

Therefore length of PR is 6.4 units and option 4 is correct.

3 0
3 years ago
There are exactly three colors of socks in lamont's drawer: red, blue, and green. the current ratio of red to blue to green sock
Harrizon [31]
If the current ratio of red to blue to green socks is 2:3:7, then t<span>here are exactly 2x red socks, 3x blue socks and 7x green socks.
</span>
1. If amount of red socks are increased by n new socks, then t<span>here are exactly 2x+n red socks, 3x blue socks and 7x green socks and (2x+n):3x:7x=8:9:21. This means that 2x+n=8y, 3x=9y, 7x=21y. You have that x=3y and 6y+n=8y, n=2y.
</span>
2. If amount of blue socks are increased by n+2 new socks, then t<span>here are exactly 2x red socks, 3x+n+2 blue socks and 7x green socks and 2x:(3x+n+2):7x=2:4:7. This means that 2x=2t, 3x+n+2=4t, 7x=7t. Now you have that x=t and 3t+n+2=4t, n=t-2.
</span><span>
</span><span>3. Solve x=3y, n=2y, x=t, n=t-2. You obtain that t=3y, t-2=2y. Then 3y-2=2y and y=2. Hence, x=6=t, n=6-2=4.
</span><span>
</span><span>Answer: n=4
</span>

4 0
3 years ago
Find the radius of a sphere with a volume of 4.5π<br> cubic centimeters.
garik1379 [7]
R≈1.02 
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8 0
3 years ago
Answers? i will mark brainliest if all correct​
Marat540 [252]
All yuh have to do is double click the boxes and the correct number will pop up.
5 0
4 years ago
I need help please and thank you
monitta

Answer: 8.

Step-by-step explanation:

Simplify the equation by getting rid of the exponents.

\frac{(10 * 10) -(100 + (8*8))}{2*2*2}

Which is then simplified to:

\frac{100 - 100 + 64}{8}, or 64/8. Divide to get your answer.

7 0
3 years ago
Read 2 more answers
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