please please help me I need to learn this for my school tmr thank u very much if you do help me !!

Answer:

Don has to sell 61 marbles.

Step-by-step explanation:

This question is solved by a system of equations.

I am going to say that:

Don has to sell x marbles.

Mark has to sell y marbles.

The total number of marbles is 75:

This means that:

[tex]x + y = 75[/tex]

Since we want to find x.

[tex]y = 75 - x[/tex]

Don has 5 more than 4 times the number of marbles Mark has

This means that:

[tex]x = 4y + 5[/tex]

Since [tex]y = 75 - x[/tex]

[tex]x = 4(75 - x) + 5[/tex]

[tex]x = 300 - 4x + 5[/tex]

[tex]5x = 305[/tex]

[tex]x = \frac{305}{5}[/tex]

[tex]x = 61[/tex]

Don has to sell 61 marbles.

Answer:

24 ft cubed  

Step-by-step explanation:

V=l*w*h

V=  4 x 3 x 2

4 x 3=12 and 12 x 2= 24

Answer:

m<ZWF = 11.5°

Step-by-step explanation:

Given:

m<N = 23°

Required:

m<ZWF

Solution:

Recall: Inscribed angle theorem states that an inscribed angle in a circle is equal to half of the central angle in a circle with the same subtended arc.

<ZWF is an inscribed angle

<N is a central angle

Therefore,

m<ZWF = ½(m<N)

Plug in the value into the equation and solve

m<ZWF = ½(23)

m<ZWF = 11.5°

Answer:

The answer is C

Answer:

B

Step-by-step explanation:

90-60 is 30 and it goes backwards so it is -30

Answer: -0.4

Step-by-step explanation:

Answer:

[tex]Q(x) = 4x^2 -3x + 2\\\\Q(-3) = 4(-3^2) -3(-3) +2 = 36 +9 +2 = 47[/tex]

Answer:

The rate of return is 14%

Step-by-step explanation:

The rate of return can be determined by,

RR = [tex]\frac{A_{f} - A_{i} }{A_{i} }[/tex] x 100%

where:

RR is the rate of return

[tex]A_f}[/tex] is the final amount = $690 -  $6 = $684

[tex]A_{i}[/tex] is the initial amount = $15 x 40 = $ 600

So that,

RR = [tex]\frac{684 - 600}{600}[/tex] x 100%

     = 0.14 x 100%

     = 14%

Therefore, the rate of return is 14%.

Answer:

b

Step-by-step explanation:

Please mark brainliest

Answer:

28.27433

Step-by-step explanation:

Answer:

1 and 3

Step-by-step explanation:

Answer:

1 and 3

Step-by-step explanation:

Answer:

C. The line that divides a figure into two mirror images

Step-by-step explanation:

I calculated it logically

Answer:

In a function of two variables, the critical points are these in which both derivatives are 0, and if:

[tex]\frac{d^2f}{dx^2}*\frac{d^2f}{dy^2} - [ \frac{d^2f}{dxdy} ]^2 < 0[/tex]

the point is a saddle point.

If the above equation is larger than zero, the critical points can be either a local maximum or a local minimum.

If it is equal to zero, no conclusions can be made.

First, let's find all these derivatives.

df/dx = 4*(x^3)*(y^2)

This is zero when x or y are equal to zero.

df/dy = 2*(x^4)*(y)

This is equal to zero when either x or y are equal to zero.

So in both cases, the points of the form:

(x, 0) and (0, y) are zeros of the first derivative, so these are the critical points.

Now let's look at the second derivatives:

[tex]\frac{d^2f}{dx} = 4*3*x^2*y^2 = 12*x^2*y^2[/tex]

[tex]\frac{d^2f}{dy^2} = 2*x^4[/tex]

[tex][\frac{d^2f}{dxdy} ]^2 = (4*x^3*2*y)^2 = 64*x^6*y^2[/tex]

Then, the equation to see if the points are saddle points or not are:

[tex](12*x^2*y^2)*(2*x^4) - 64*x^6*y^2 < 0[/tex]

In any of the previous found points (the ones of the form (x, 0) and (0, y)) the above equation will be equal to zero, then none of these points is a saddle point. More than that, in the particular case where the above equation is equal to zero, the critical points can be either: A relative minimum, a relative maximum, or a saddle point (so we need more analysis to find it out)

But in this case is ratter simple, because both powers in f(x, y) are even, we can conclude that the function is even and symmetric about x= 0 and y = 0, and the function is also positive, so all the points:

(0, y) and (x, 0) are the minimum values that f(x, y) can take.

Then the critical points are relative minimums.

Answer:

6 groups

Step-by-step explanation:

Division: 30/5 = 6

Multiplicatio: 6 times 5 = 30

hope it helps, have a nice day~

Answer:

No

Step-by-step explanation:

here's a little trick, add a zero to make both numbers the same.

it's doesn't change the value.

so .27 and .3 become .27 and .30

and .30 is greater

Answer:

Step-by-step explanation:

There are 36 inches in a yard.

1 /36  = x / 450    Multiply by 450

450/36 = x

x = 12.5 yards.

Answer:

picture? (170

Step-by-step explanation:

Answer:

18

Step-by-step explanation:

.

Answer:

18

Step-by-step explanation:

Answer:

58.2

Step-by-step explanation:

We can find the length of RS using similarity ratio

7/34 = 12/RS cross multiply expressions

7RS = 408 divide both sides by 7

RS = 58.2 approximately.

Answer:

[tex] - 21 + 2(3 - 15) - ( - 3)( + 7) + ( - 3)( - 8) \\ = - 21 - 24 + 21 + 24 \\ = 0[/tex]

Answer:

The probability of Karmen picking a car with a black exterior and a beige interior is

1/6. The probability of Karmen picking a car with a beige interior and an automatic transmission is

1/4.

Step-by-step explanation:

The number of possible outcomes from the tree diagram is 12.

Two of the possible outcomes are a car with a black exterior and a beige interior. The probability of Karmen picking a car with a black exterior and a beige interior is , or .

Three of the possible outcomes are a car with a beige interior and an automatic transmission. So, the probability of Karmen picking a car with a beige interior and an automatic transmission is , or .

Answer:

1/6 and 1/4

Step-by-step explanation:

Just did this.

Answer:

The percent of the area under the density curve where [tex]x[/tex] is more that 3 is 25 %.

Step-by-step explanation:

Since the density curve is a linear function, the area under the curve can be calculated by the geometric formula for a triangle, defined by the following expression:

[tex]A = \frac{1}{2}\cdot (x_{f} - x_{o})\cdot (y_{f}-y_{o})[/tex] (1)

Where:

[tex]A[/tex] - Area, in square units.

[tex]x_{f} - x_{o}[/tex] - Base of the triangle, in units.

[tex]y_{f} - y_{o}[/tex] - Height of the triangle, in units.

The percent of the area is the ratio of triangle areas under the density curve multiplied by 100 per cent, that is:

[tex]x = \frac{\frac{1}{2}\cdot (5-3)\cdot (0.25) }{\frac{1}{2}\cdot (5-1)\cdot (0.5) }\times 100\,\%[/tex]

[tex]x = 25\,\%[/tex]

The percent of the area under the density curve where [tex]x[/tex] is more that 3 is 25 %.

Answer:

12

Step-by-step explanation:

Answer:

y=+- 2√10 -1

Step-by-step explanation:

Answer:

Step-by-step explanation:

The question is incomplete. please provide the clear question to answer.