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3 years ago

What is the value for y

Mathematics

2 answers:

mixas84 [53]3 years ago

5 0

Answer:

y=28

Step-by-step explanation:

4y=180-34-34

4y=180-68

4y=112

y=28

BaLLatris [955]3 years ago

5 0

Answer:

y=28

Step-by-step explanation:

34 is equal to (x-5). multiply 34 times 2, and it equals 68. all of the sides equal 180, therefore meaning 4y equals 112. divide by 4 and get 28.

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The age of a boy is twice that of his sister. five years ago the boy was 3 times the age of his sister. How old is the boy

joja [24]

Answer:

<h2>20 years old.</h2>

Solution,

Let the age of sister be X

Let the age of boy be 2x

Now,

Five years ago,

 $3(x - 5) = 2x - 5 \\ or \: 3x - 15 = 2x - 5 \\ or \: 3x - 2x = - 5 + 15 \\ x = 10$ 

Again,

Replacing value,

 $age \: of \: boy = 2x \\ \: \: \: \: \: \: \: \: \: \: \: \: \: = 2 \times 10 \\ \: \: \: \: \: \: \: \: \: \: \: = 20$ 

hope this helps..

Good luck on your assignment..

7 0

3 years ago

The volume V of a cone varies jointly as the area of the base B and the height

seraphim [82]

Answer:

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Step-by-step explanation:

V = kBh where k is the constant of variation.

From the given info:

32 = k*16*6 = 96k

So k = 32/96 = 1/3.

So we have the equation of variation:

V = 1/3Bh

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60 = 1/3 20h

20h = 60 * 3 = 180

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2 years ago

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What is the slope of the line that passes through the points (9, 1) and (17, 2)

Wewaii [24]

Answer:

Step-by-step explanation:

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OLEGan [10]

Given that-

√(0.09×0.09×x) = 0.09×0.09×√z

On squaring both sides then

⇛[√(0.09×0.09×x) ]² = (0.09×0.09×√z)²

⇛ 0.09×0.09×x= (0.09)²×(0.09)²×(√z)²

⇛ (0.09)² × x = (0.09)²×(0.09)²×z

⇛ (0.09)² × x/z = (0.09)²×(0.09)²

⇛x/z = (0.09)²×(0.09)²/(0.09)²

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