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bearhunter [10]
2 years ago
9

Which linear inequality is represented by the graph? Oys=x+2 Oy² 2x+2 Oy≤ x+2 Oy²x+2

Mathematics
1 answer:
Arada [10]2 years ago
4 0

Answer:

y ≤ \frac{1}{2}x + 2

(first option listed)

Step-by-step explanation:

To quickly find what function is graphed, you can test out one point you find on the graph.

Here, a simple x-value to plug in is 0, because we know it must be equal to 2.

We also know, from what part of the graph is shaded, that this inequality is everything <em>less</em> than that point

(meaning that we should see y ≤ in the inequality)

So, knowing that y must be  ≤   eliminates half of the answer options.

If we plug in 0 to either, we get 2.

So, we need to choose another x-value to evaluate.

We can see that when x = -2, y = 1

We can quickly plug this into both equations

(\frac{1}{3}) (-2)= \frac{-2}{3}\\\\ \frac{-2}{3} +2 = \frac{4}{3}

\frac{4}{3} \neq 1

-----------------------------------

(\frac{1}{2})(-2) = -1\\ \\-1+2 = 1

1 =1

This means that this graph represents the linear inequality:

y ≤ \frac{1}{2} x + 2

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Is 2.4, 4.5 and 5.2 a right triangle?
grandymaker [24]

Answer:

No

Step-by-step explanation:

Use the pythagorian theorm to find whether it's a right triangle or not.

So the hyp will be the largest number. And the hyp must be equal to the sum of b and c squared

5.2 squared= 2.4 squared+ 4m5 squared

27.04= 26.01

It's not equal so the triangle isn't a right triangle.

3 0
2 years ago
How did convenience store there is a 25% chance as customer enters the store within one minute of closing time describe the comp
valentinak56 [21]
The complementary is not entering the store one minute before closing.

The probability of not entering the store one minute before closing is 75%

7 0
3 years ago
Read 2 more answers
When 18 boys joined a group of why students, the ratio of boys to girls in the group became 4 : 5. Write an algebraic expression
expeople1 [14]
18 /(y + 18) = 4/9 <<<<===== answer. 
be careful the number of boys is in a ratio of the number of boys to the total.
Just to make sure I'm right, I solve it.
18 * 9 = 4*(y + 18)
162 = 4y + 72 Subtract  72 from both sides.
 90 = 4y Divide by 4
22.5 = y Never mind the 0.5. Does it work

18/22.5 = 0.8 
0.8 is the same thing as 4/5 
The problem makes no sense in the real world, but it does work out mathematically.
5 0
3 years ago
Determine if the two lines are perpendicular. Explain how you know by calculating the slopes and comparing the slopes in 2-3 sen
statuscvo [17]

Answer:

The two lines are not perpendicular because the product of their slopes is not equal to -1

Step-by-step explanation:

The product of the slopes of the perpendicular line is -1

  • That means one of them is and additive and multiplicative inverse of the other
  • If the slope of one of them is m, then reciprocal m and change its sign, then the slope of the perpendicular is -\frac{1}{m}
  • The formula of the slope is m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}

Let us find from the graph two points lie on each line and calculate the slopes of them and then find its product if the product is -1, then the two lines are perpendicular

From the graph

∵ The red line passes through points (4 , 0) and (0 , 8)

∴ x_{1} = 4 and x_{2} = 0

∴ y_{1} = 0 and y_{2} = 8

∵ m=\frac{8-0}{0-4}=\frac{8}{-4}=-2

∴ The slope of the red line is -2

∵ The blue line passes through points (5 , 5) and (0 , -5)

∴ x_{1} = 5 and x_{2} = 0

∴ y_{1} = 5 and y_{2} = -5

∵ m=\frac{-5-5}{0-5}=\frac{-10}{-5}=2

∴ The slope of the blue line is 2

∵ The products of the slopes of the two lines = -2 × 2 = -4

∴ The product of the slopes of the lines not equal -1

∴ The two lines are not perpendicular

6 0
3 years ago
12) u= a + k - b, for a<br><br> Helppppp
KATRIN_1 [288]

Answer:

a = u - k + b

Step-by-step explanation:

u = a + k - b

u - k + b = a+ k - b - k + b

u - k + b =  a

3 0
4 years ago
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