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Likurg_2 [28]
3 years ago
9

I need help, along with an explanation, for this question.

Mathematics
1 answer:
Aleksandr-060686 [28]3 years ago
8 0

Answer:

1.  -9

2.  -15

Step-by-step explanation:

Reduce the expression, if possible, by cancelling the common factors.

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The diagrams shows a 3cm x 5cm x 4cm cuboid.
Vera_Pavlovna [14]

Answer:

a) 5.83 cm

b) 34.45°

Step-by-step explanation:

a) From Pythagoras theorem of right triangles, given right triangle ABC:

AB² + BC² = AC²

Therefore:

AC² = 5² + 3²

AC² = 25 + 9 = 34

AC = √34

AC = 5.83 cm

b) From triangle ACD, AC = 5.83 cm, AD = 4 cm and ∠A = 90°.  

From Pythagoras theorem of right triangles, given right triangle ACD:

AD² + AC² = DC²

Therefore:

DC² = 5.83² + 4²

DC² = 34 + 16 = 50

DC = √50

DC = 7.07 cm

Let ∠ACD be x. Therefore using sine rule:

\frac{4}{sin(x)}=\frac{7.07}{sin(90)} \\ sin(x)=\frac{4*sin(90))}{7.07}=0.5657\\ x=sin^{-1}(0.5657)\\x=34.45^o

6 0
3 years ago
Jerry uses 7/5 quarts of oil to change his car's oil. Which mixed number represents the quarts of oil he used
Viktor [21]
The answer is B because math
5 0
2 years ago
648 ÷ 8 tell how you solved pls i need help
stira [4]

Answer:

The answer is 81

Step-by-step explanation:

All you have to do is create your long division chart with 648 inside and 8 on the outside 8 can not go into 6 but it can go into 64 so 8 goes on top of 4 you subtract 64 minus 64 becayse 8 times 8 is 64. Lastly you bring down the other 8 and 8 goes into 8 once so you put 1 on top. And so thats how you get 81.

8 0
3 years ago
Read 2 more answers
All of them , please and thank you
aalyn [17]
1) Simplified: k-6
Excluded Value: k=-10

2) Simplified: 4/k-8
Excluded Values: k=-4, k=8, k=4

3) Simplified: 10/9m
Excluded Values: m=0, m=-3

4) Simplified: a-3
Excluded Values: a=1, a=2, a=6

5) Simplified: 3/4
Excluded Value: y= 0

6) Simplified: 4-3x/2x
Excluded Values: X=0
7 0
3 years ago
One leg of a right triangle is 28 inches longer than the other leg, and the hypotenuse is 52 inches. Find the lengths of the leg
katovenus [111]

Step-by-step explanation:

Let x represent the missing sides measurement.

x+x+28=52

combine like terms

2x + 28 = 52

subtract 28 from both sides

2x + 28 = 52

     - 28  - 28

2x = 24

divide both sides by 2

x = 12

plug it back in

one leg is 12 inches

the other leg is 40 inches

7 0
3 years ago
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