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3 years ago

2 : 3 = .... : 9 ? 5 : 10 = 20 : ...? 1 : 3 = 8 : 24 ......? 4 : 3 = 16 : 2 ....?

Mathematics

2 answers:

alekssr [168]3 years ago

7 0

Step-by-step explanation:

first one is 6:9

second is 20:40

sorry I'm not sure about the others!

klio [65]3 years ago

7 0

Answer:

six

Step-by-step explanation:

9/3=3 so then do 2x3= six

20/5=4 so then do 4x10= 40

24/1= 24 so then do 24x3= 72

sixteen/4= 4 so then do 3x4= 12

Hope this helps mark me brainiest and leave a thanks please

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Set up equations and solve them to find the unknown numbers in the following cases:

noname [10]

Answer:

the answer is 21

Step-by-step explanation:

the number she thinks of is 21 add 21 + 19 to get 40.

divide 40 by 5 to get 8.

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2 years ago

Triangle PQR has vertices P(-3, -1), Q(-1, 7), and R(3, 3), and point A and B are midpoints of PQ and RQ, respectively. Use coor

andrezito [222]

Answer:

Part a) The figure a shows that AB is parallel to PR. Please see attached figure a.

Part b) The length of AB is half the length of PR

Step-by-step explanation:

Part A)

Let M be the midpoint formula between points A(x₁, y₁) and B(x₂, y₂)

$M=({\displaystyle {\frac {x_{1}+x_{2}}{2}}, {\frac {y_{1}+y_{2}}{2})$

Let A be the midpoint of P(-3, -1) and Q(-1, 7)

The coordinates of the midpoint of P(-3, -1) and Q(-1, 7):

$Mpq{} =({\displaystyle {\frac {-3+(-1)}{2}}, {\frac {-1+7}{2})$

$Mpq{} =(-2, 3)$

Let B be the midpoint of Q(-1, 7) and R(3, 3):

$Mqr{} =({\displaystyle {\frac {-1+(3)}{2}}, {\frac {7+3}{2})$

$Mqr{} =(1, 5)$

The figure a shows that AB is parallel to PR. Please see attached figure a.

Part B)

The point A has the coordinates: A(-2, 3)

The point B has the coordinates: B(1, 5)

The distance formula is: $d={\sqrt {(x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2}$

So, the length of AB $={\sqrt {(1-(-2))^{2}+(5-3)^{2}$

= $\sqrt{9+4}$

= $\sqrt{13}$

= $3.6056$

And, the length of PR $={\sqrt {(3-(-3))^{2}+(3-(-1)^{2}$

= $\sqrt{36+16}$

= $\sqrt{52}$

= $2\sqrt{13}$

= = $7.2111$

As the length of AB = 3.6056 and the length of PR = 7.2111

So, it is clear that the length of AB is half the length of PR.

Keywords: distance formula, midpoints, triangle, coordinate plane

Learn more about midpoints from brainly.com/question/7560674

#learnwithBrainly

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3 years ago

If you wanted to make the graph of y = 3x + 1 steeper, which equation could you use?

icang [17]

Y = 3x + 1

y = mx + b

Where,
m = Rise/Run (Slope)
b = y-intercept

Changing the y intercept wouldn't change the steepness, but instead it would change where the graph would cross the y-axis (vertical axis).

The slope is the rise over run. So for the current graph you would go up 3 and then over 1. If you increased the number by any amount you would be going higher while going the same distance to the right. As a result the line would be getting steeper and steeper.

In other words the answer will be the one with a higher slope. If the slope is a fraction take our original slope and find a common denominator. Then compare.

I hope that this helps!

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If we divide by 6 on the left side,

we must also divide by 6 on the right side.

On the left side, the 6's cancel and we have x.

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