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Stells [14]
3 years ago
6

PLSSS HELP IF YOU TURLY KNOW THISS

Mathematics
2 answers:
AleksAgata [21]3 years ago
8 0

Answer:

20 ........................

saveliy_v [14]3 years ago
7 0

64  gas lakdis  8tams8 8 8 you kone all 64

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HELP ME PLZZZZ!!!!!<br><br><br> It’s just 21 and 22
galina1969 [7]

Answer:

21) 12 cm

22) 5.9 cm

Step-by-step explanation:

21) The base is 10, and if the other two sides are congruent and the perimeter is 36, we can figure out with simple algebra that the sides are 13 cm long.

Half of 10 is 5, so we can use the pythagorean theorem.

5^2+x^2=13^2

Rearranging the variables we have 169-25=x^2

144=x^2

x can be plus or minus 12, but since negative length is impossible we find that x is positive 12 cm.

22) We want to use sine, because we have opposite and hypotenuse. A simple and easy way to memorize this is the SohCahToa method. If we have opposite (O) and hypotenuse (H) we have OH. Soh has the letters O and H, and the S means we should use sine.

sine 36=a/10

Plug this into a calculator or desmos scientific calculator to get a=5.9

7 0
3 years ago
What is the word for the following fraction? <br> 4/7
VLD [36.1K]

Answer:four over seven

Step-by-step explanation:

6 0
3 years ago
Classify the triangle by its​ sides, and then by its angles.
Brums [2.3K]

Answer:

isosceles

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Dave walked to his friend's house at a rate of 4 mph and returned back biking at a rate of 10 mph. If it took him 18 minutes lon
katrin [286]

Answer:

4 miles

Step-by-step explanation:

<u>Walking:</u>

Distance  = d miles

Rate = 4 mph

Time = t hours

d=4\cdot t

<u>Biking:</u>

Distance = d miles

Rate = 10 mph

Time =t-\dfrac{18}{60}=t-0.3 hours (convert minutes to hours)

d=10\cdot (t-0.3)

Hence,

4t=10(t-0.3)\\ \\4t=10t-3\\ \\4t-10t=-3\\ \\-6t =-3\\ \\6t=3\\ \\t=\dfrac{3}{6}=\dfrac{1}{2}=0.5\ hour

Therefore, the distance to friend's house is

d=4\cdot 0.5=2\ miles

and the total distance of the round trip is

2+2=4\ miles

6 0
3 years ago
This is a picture of a cube and the net for the cube.<br> What is the surface area of the cube?
posledela

Answer:

6a²

Step-by-step explanation:

6×5² = 6×25 = 150cm²

thank you

8 0
2 years ago
Read 2 more answers
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