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solmaris [256]
2 years ago
10

A box contains erasers of two

Mathematics
1 answer:
olga2289 [7]2 years ago
4 0

Answer:

There will be 28 green erasers. I know that the ratio is also 28:20, so there are 20 blu erasers.

Step-by-step explanation:

I time 7 by 4 and 5 by 4 to get the new ratio. I counted the ratios to get to 48.

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If g(x) = 3x - 5, then g -1(x) = a.) 3x + 5 b.) x+5 / 3 c.) x/3 + 5
lisov135 [29]

Answer:

-2

Step-by-step explanation:

8 0
3 years ago
Please help me with this problem
aleksandr82 [10.1K]

9514 1404 393

Answer:

  (x, y) = (-3, -13) or (-8, -23)

Step-by-step explanation:

The values for y can be equated and the resulting quadratic solved by factoring.

  2x -7 = x^2 +13x +17

  0 = x^2 +11x +24 . . . . . . subtract 2x-7

  0 = (x +8)(x +3) . . . . . . . .factor*

The values of x that make these factors zero are x=-8 and x=-3. The corresponding values of y are ...

  y = 2(-8) -7 = -23

  y = 2(-3) -7 = -13

The solutions are ...

  (x, y) = (-8, -23) and (-3, -13)

_____

* The constants in the binomial factors are factors of 24 that total 11. You know that ...

  24 = 1×24 = 2×12 = 3×8 = 4×6

The sums of these factors are 25, 14, 11, 10. The factors 3 and 8 are the constants in the binomial factors of the quadratic.

"24" is the constant in the quadratic. "11" is the coefficient of the x term.

6 0
3 years ago
20 % of 2 is equal to <br><br> A. 20 <br> B. 4 <br> C. 0.4 <br> D. 0.04
ExtremeBDS [4]
I think the answer is 0.4

4 0
3 years ago
Is the square root of 222 rational number ​
nignag [31]

Answer:

The square root of 222 is an irational number.

7 0
3 years ago
Read 2 more answers
I need help with Question 14 . I need to submit it by monday...<br> Pls help
GaryK [48]

Answer:

Distance between A and B is 5400 meters

Step-by-step explanation:

Consider "D" the letter to identify distance between A and B

Let's use "t" to identify the time of the first encounter (Devi and Kumar), and create an equation that states that the distance covered by Devi (at 100 m/min) in time "t", is equal to the total distance D minus what Kumar has covered at his speed (80 m/min) in that same time:

Recall that distance equals the speed  times the time:

distance= speed * time

First encounter:

100 * t = D - 80 * t

180 * t = D    Equation (1)

Not, 6 minutes later (at time t+6) , Devi and Li Ting meet .

Then for this encounter the distance covered by Devi equals total distance d minus the distance covered by Li Ting:

100 *(t+6) = D - 75 * (t+6)

100 t + 600 = D - 75 t - 450

175 T + 150 = D    Equation (2)

Now, let's equal equation (1) to equation (2), since D should be the same:

180 t = 175 t + 150

5 t = 150

t = 30

Then the time t (first encounter) is 30 minutes. Knowing this, we can use either equation to find D:

From Equation (1) for example: D = 180 * t = 180 * 30 = 5400 meters

5 0
3 years ago
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