4 years ago

HELP please !!!!!!!!!!!

Mathematics

1 answer:

STatiana [176]4 years ago

5 0

Answer:34

Step-by-step explanation:

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In segment JK, JH = 4x - 15 and HK = 2x +3, where H is between J and K on segment JK.

xeze [42]

If JK = 48, x is equal to 10

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3 years ago

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In each of the following ,make y the subject and hence find the value of y when a=2, b=3 ,and c=4.

zvonat [6]

Part i

$\dfrac{2a-7}{6y} = \dfrac{3b-5}{2c}$

$y = \dfrac{ 2c(2a-7)}{6(3b-5)} = \dfrac{c(2a-7)}{9b-15}$

Substituting,

$y = \dfrac{4(2(2)-7)}{9(3)-15} = \dfrac{ -12}{12} = -1$

Answer: -1

Part ii

I'm not sure that one's typed in correctly but I'll solve it as written.

$3-34y + 2a = \dfrac{3b-5}{2c + 1}$

$34y = 3+2a-\dfrac{3b-5}{2c + 1}$

$y = \frac 1 {34}\left(3+2a-\dfrac{3b-5}{2c + 1} \right)$

We're not asked to simplify it so I wont. Substituting,

$y = \frac 1 {34}\left(3+2(2)-\dfrac{3(3)-5}{2(4) + 1} \right) = \frac 1 {34}(7-4/9) = \dfrac{59}{306}$

Answer: 59/306

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4 years ago

Write an expression to find the perimeter of<br> the rectangle below:

taurus [48]

Answer:

the expression is (4x+2-x) * 2 =

Step-by-step explanation:

Write an expression to find the perimeter of

the rectangle below:

rectangle perimeter = (w + l) *2

(4x+2-x) * 2 =

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2 years ago

What times what equals 42

melamori03 [73]

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you need 2 multiples so you could do 7 x 6

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3 years ago

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Use the equation f=3c+19 to find the value of f when c=7.

pogonyaev

Answer:

f = 40

Step-by-step explanation:

f=3c+19

Let c = 7

f = 3*7 +19

Multiply first

f = 21+19

f = 40

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3 years ago

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