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klio [65]
3 years ago
8

Help me out i need help

Mathematics
1 answer:
OleMash [197]3 years ago
4 0

Answer:

false, true and false

Step-by-step explanation:

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The bar graph below shows the attendance at school dances. The ticket per price for each dance is $5 per student. Which two danc
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It's B because all the students that attended added together is 320 and 37.5 of 320 is 120

6 0
3 years ago
A line joins the point
Harrizon [31]

Intersection of the first two lines:

\begin{cases}5x - 2y + 3 = 0\\4x - 3y + 1 = 0\end{cases}

Multiply the first equation by 4 and the second by 5:

\begin{cases}20x - 8y + 12 = 0\\20x - 15y + 5 = 0\end{cases}

Subtract the two equations:

(20x - 8y + 12)-(20x - 15y + 5)=0 \iff 7y+7=0 \iff y=-1

Plug this value for y in one of the equation, for example the first:

5x - 2\cdot (-1) + 3 = 0\iff 5x+5=0 \iff x=-1

So, the first point of intersection is (-1,-1)

We can find the intersection of the other two lines in the same way: we start with

\begin{cases}x=y\\x=3y+4\end{cases}

Use the fact that x and y are the same to rewrite the second equation as

x=3x+4 \iff 2x=-4 \iff x=-2

And since x and y are the same, the second point is (-2, -2)

So, we're looking for a line passing through (-1,-1) and (-2, -2). We may use the formula to find the equation of a line knowing two of its points, but in this case it is very clear that both points have the same coordinates, so the line must be y=x

In the attached figure, line 5x - 2y + 3 = 0 is light green, line 4x - 3y + 1 = 0 is dark green, and their intersection is point A.

Simiarly, line x=y is red, line x = 3y + 4 is orange, and their intersection is B.

As you can see, the line connecting A and B is the red line itself.

5 0
3 years ago
Helppp please if anyone know
zmey [24]
81 - 35+30 (55) = 26 therefore 26cm is ur final answer
7 0
3 years ago
Read 2 more answers
Find the percent change from 50 to 22
djyliett [7]

Answer:

28

Step-by-step explanation:

50 - 22 = 28

7 0
3 years ago
Read 2 more answers
6x - 2y = 26<br><br> 2x + 3y = 5
labwork [276]

Answer:

x = 4, y=-1

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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