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dedylja [7]
3 years ago
13

The value of y varies directly with x, where LaTeX: y=50y = 50 when LaTeX: x=40x = 40. Find the value of x when y is 10.

Mathematics
1 answer:
Xelga [282]3 years ago
5 0

Answer:

x= 8

Step-by-step explanation:

The equation of direct variation is

y = kx

When y = 50  when x = 40

50 = k* 40

Divide each side by 40

50/40 = k

5/4 = k

The equation is

y = 5/4x

Let y = 10

10 = 5/4x

Multiply each side by 4/5

4/5 * 10 = 5/4 x * 4/5

8 = x

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AB is tangent to O. If AO=12 and BC=25 what is AB ? The diagram is not to scale.
Marat540 [252]
The answer is A


AO = 12

BC= 25+ 12= 37
you can get help from Pythagoras theorem
{37}^{2} =  {12}^{2}  +  {x}^{2}  \\  -  {x}^{2}  =  {12}^{2}    -   {37}^{2}  \\  -  {x}^{2}  = 144 - 1369 = -  1225 \\1225 =  {x}^{2}
x =  \sqrt{1225}  = 35


good luck
3 0
3 years ago
A 13foot lader i upagenst a tree the bottom of the ladder is 5 feet away form the tree how high is the ladder on the tree
SCORPION-xisa [38]

Think of the 13-ft length of the ladder as the hypotenuse of a right triangle. Represent the horiz. distance from foot of ladder to base of tree by x, or 5 ft.

Represent the vert. dist. from base of tree to top of ladder by y, which is unknown.


Then (13 ft)^2 = (5 ft)^2 + y^2, or


169 ft^2 = 25 ft^2 + y^2. This simplifies to y^2 = 144. Thus y = + 12 feeet.


Note: Please pay attention to your spelling: "lader i up agenst a tree" should be "the top of a 13-ft ladder is placed against a tree."

7 0
3 years ago
This is another linear equation
Helga [31]

y=mx+b is the answer

7 0
3 years ago
Anyone please help me with this question.
Ierofanga [76]

Answer:

The answer is 207 miles per hour

Step-by-step explanation: You can find this answer by taking 332 and converting it to a fraction and then multiplying it by 5/8. That would look like this 332/1 X 5/8 = x. Then you multiply then numerators, then denominators and simplify the fraction. Next you can divide the numerator by the denominator. And once you have this you round to the nearest whole number.

Hope this helps.

5 0
3 years ago
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Setler79 [48]

Answer:

There is not enough info to be able to answer this question properly.

Step-by-step explanation:

7 0
3 years ago
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