need help with this please..

Answer:

60

Step-by-step explanation:

50-45+90-35

Answer:

C

Step-by-step explanation:

Lets set this up:

5x-3y=2=

5x=3y+2=

5x-2=3y=

y=5/3x-2/3

Now graph this.

When graphed you see that the only point that lies on the graph is C (3,13/3)

Hope this helped!

Edit: Explanation

Answer:

11/5

Step-by-step explanation:

FirLet a and b be the roots of 11x^2-4x-2=0

Now[tex](1+a+a^2+\cdots)(1+b+b^2+\dcots)=\frac{1}{1-a}\cdot \frac{1}{1-b}\\=\frac{1}{(1-a)(1-b)}=\frac{1}{1-(a+b)+ab}[/tex]

Dividing the quadratic equation by 11 we have

[tex]x^2-\frac{4}{11}x-\frac{2}{11}=0.[/tex]

Now the sum of the roots is the minus of the coefficient of x and the product of the roots is the constant. Therefore

[tex]a+b = 4/11 \\ab = -2/11[/tex]

and we have

[tex]\frac{1}{(1-a)(1-b)}=\frac{1}{1-\frac{4}{11}-\frac{2}{11}}\\=\frac{1}{(5/11)}=\frac{11}{5}[/tex]

Answer:

18 math problems

Step-by-step explanation:

1) We can first divide the number of students to find out how many groups the teacher made from the class. This is easily solved by dividing the number of students, 24, by the number of students the teacher places in each group, which is 4. So 24 divided by 4 equals 6 groups total, the total number of groups now made.

2) Now is to find the number of math problems that the whole class solves. This is easily now solvable by multiplying the number of groups in the class, which is 6, by the number of math problems each group solves, which is 3. So basically, 6 times 3 equals 18, the total number of math problems all the groups, the whole class, solve.

Answer:

Step-by-step explanation:

Jenn is the fastest swimmer.

Time and speed is inverse proportion. If speed is more, the time taken will be less. So, who takes less time will be the fastest swimmer

We can tell from the table that Jenn is the fastest swimmer. She has the lowest time and fastest speed

Answer: 21

Step-by-step explanation:

First we have to find LCM (lowest common multiple) of the given number, i.e 700.

LCM = 2 × 2 × 5 × 5 × 7 = 700

now, let's add 7 to 700

We get the required number as 707

Answer:

the time taken is 22 mins

[tex]\\ \sf\longmapsto \dfrac{7}{x-5}=\dfrac{5}{x+7}[/tex]

[tex]\\ \sf\longmapsto 7(x+7)=5(x-5)[/tex]

[tex]\\ \sf\longmapsto 7x+49=5x-25[/tex]

[tex]\\ \sf\longmapsto 7x-5x=-25-49[/tex]

[tex]\\ \sf\longmapsto 2x=-74[/tex]

[tex]\\ \sf\longmapsto x=\dfrac{-74}{2}[/tex]

[tex]\\ \sf\longmapsto x=-37[/tex]

Answer:(2.5, 5.5)

Step-by-step explanation:

9514 1404 393

Answer:

  49

Step-by-step explanation:

The sum of 5 numbers that have an average of 30 is ...

  sum = 5×30 = 150

The numbers below the median need to be as small as possible, so that the remaining numbers can be as large as possible. If the two numbers below the median are both 1, then the sum of the remaining 3 must be ...

  150 -1 -1 = 148

The median will be as large as possible when the least of the remaining three numbers is as large as possible. That will be the case when those three numbers are all the same.

  148/3 = 49.333...

Since the numbers must be integers, the possible values for the high three numbers are 49, 49, 50.

In the set {1, 1, 49, 49, 50}, the mean is 30 and the median is 49. This value is the largest possible median for this set.

Answer:

the awnser of this question is 3,5,8

9514 1404 393

Answer:

  2a. (360x +495)/(8x +11) = 45

  2b. 2((8x+11) +45) = 16x +112

Step-by-step explanation:

a) The area is the product of length and width.

  A = LW

We are given ...

  W = 8x +11

  A = 360x +495

The value of length can be found by solving for L:

  L = A/W

  L = (360x +495)/(8x +11)

The long-division solution to this is shown in the attachment.

  L = 45 . . . . simplified expression for length

__

b) The perimeter of the tank is twice the sum of length and width:

  P = 2(L +W)

Substituting the values for L and W, this is ..

  P = 2(45 +(8x +11)) . . . . expression for length of edge seal

  P = 2(8x +56)

  P = 16x + 112 . . . . . . simplified expression for seal length

Answer:

x=4/3 .   x=2/5

Step-by-step explanation:

Step-by-step explanation: 3.300 / 150=  22 limoeiros+  4=  26

Answer:

I'm sure it is 7.02!

Step-by-step explanation:

Answer:

23/24

Step-by-step explanation:

I hope it will help

Answer:

im not that good at math but i think is about 101.39388

Step-by-step explanation:

129 units²

The surface area is the area of all the surfaces basically.

so the three rectangular sides are 7 by 5, which gives you 35.

There's three of them, so 105.

There are also two triangular sides that are 6 by 4.

equation to find area of triangle is [tex]\frac{1}{2}[/tex]b · h, which is a fancy equation for half base times height.

so base times height, 24. Half is 12.

There are two sides, so 24 units squared.

105+24 is 129.

Hope this helps, and please consider marking branliest.

Answer:

[tex] {( \frac{ {2x}^{4} {y}^{4} }{ {4x}^{2} } )}^{3} \\ [/tex]

open the bracket:

[tex] = \frac{ {2x}^{(4 \times 3)} {y}^{(4 \times 3)} }{ {4x}^{(2 \times 3)} } \\ [/tex]

simplify:

[tex] = \frac{ {2x}^{12} {y}^{12} }{ {4x}^{6} } \\ [/tex]

group x terms together:

[tex] = ( \frac{ {2x}^{12} }{ {4x}^{6} } ) \times {y}^{12} \\ \\ = (\frac{ {x}^{(12 - 6)} }{2} ) \times {y}^{12} \\ \\ = \frac{ {x}^{6} }{2} \times {y}^{12} [/tex]

factorise out power 6:

[tex] { \boxed{= \frac{ {(xy {}^{2}) }^{6} }{2} }}\\ [/tex]

Answer:

[tex]change \: n \: temparature = final - initial \\ = 15 - - 13 \\ = 28degree \: celcius[/tex]

[tex]thank \: you[/tex]

Answer:

the temperature went up by 28C

Step-by-step explanation:

15--13

Answer:

54!

Step-by-step explanation:

300-30

=270×.20

=54

Answer:

a

Step-by-step explanation:

a rational number is a whole number