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patriot [66]
3 years ago
6

THIS IS QUESTION 4 OF A 30 QUESTION TEST!! PLEASE HELP!!

Mathematics
1 answer:
Roman55 [17]3 years ago
8 0

Answer:

b

Step-by-step explanation:

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If y varies jointly as x and the cube of z and y=16 when x=4 and z=2 then y=0.5 when x=-8 and z=-3?
Evgesh-ka [11]

Answer: F (False)

Step-by-step explanation:

 Jointly variation has the following form:

y=kxz

Where k is a constant of propotionality.

Substitute values:

If y=16, x=4 and z=2, then k is:

16=k(4)(2)^{3}\\k=1/2

If x=-8 and z=-3 the the value of y is:

y=(1/2)(-8)(-3)^{3}\\y=-108

Then the answer is FALSE.

8 0
3 years ago
Read 2 more answers
A triangle that has no sides of equal length and one angle greater than 90° is which type of triangle?
Ganezh [65]

Answer:

It’s a obtuse triangle/scalene triangle

Step-by-step explanation:

Giving the information that is provided if the sides are not equal then it seems to be that the correct answer would be Obtuse Scalene

6 0
2 years ago
Read 2 more answers
onsider the following problem: A box with an open top is to be constructed from a square piece of cardboard, 3 ft wide, by cutti
Sholpan [36]

Answer:

V (max)  = 2 ft³

and x side of the base is  x  =  0,5 feet

Step-by-step explanation:  See annex ( two different cubes)

We have a square piece of cardboard of  3 inches wide

Let  x be lenght of side to cut in each corner

Then the base of the (future cube) is    3  -  2x,  and the area is  

( 3 - 2x )²

And  the height   is x  Then volume of the cube as a function of x is:

V(x)  =  ( 3 - 2x )² *x   or       V(x)  =    ( 9 + 4x² - 12x )*x

V(x)  =  4x³  -  12x²  + 9x

Taking derivatives on both sides of the equation

V´(x)  =  12x² - 24x  + 9

V´(x)  =  0       12x² - 24x  + 9  =  0   simplifying   4x² - 8x  + 3  =  0

Second degree equation solving for x

x₁,₂ =  [ 24 ± √( 576) - 432  /24

x₁,₂ =  [24 ±√144 ]/24

x₁,₂ = ( 24 ± 12) /24         x₁  =  1.5 feet        x₂  = 0,5 feet

Of these two values we have to dismiss x₁  because if  x = 1.5 we don´t have a cube ( 0 height )

Then we take x  = 0,5  feet

And

V (max)  =  (2)²*0,5   =  4*0,5

V (max)  = 2 ft³

5 0
3 years ago
In a young single person's monthly budget, $150 is spent on food, $175 is spent on housing, and $175 is spend on other items. Su
dangina [55]

Answer:

35 idek

Step-by-step explanation:

5 0
3 years ago
Please help me find the answer to the attached photo
qaws [65]
Ok, I shall help.
Please give me brainliest answer.
So first step
25x+8+9x+2=180
We can do this because they are interior angles which add to 180 degrees.
So now we simplify.
25x+9x+2+8=180
34x+10=180
Minus 10 from both sides to get x.
34x = 170
Divide by 34 to only find x.
This leaves x=5 now we find y.
9x+2=7y+5
We can make these two equal because they are alternate angles which are always equal.
Now as we established earlier x is 5 so we substitute.
9(5)+2=7y+5
45+2=7y+5
47=7y+5
Now we minus 5 from both sides to leave 7y
47-5=7y
42=7y
Now we divide by 7 to only get y.
Y=6
X=5
Hope it helps!
Plz give me brainliest answer!
5 0
2 years ago
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