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3 years ago

Rita has 20 crayons.Nora has 15 more crayons than Rita.How many crayons does Nora have?

Mathematics

2 answers:

Assoli18 [71]3 years ago

7 0

Answer:

35 Crayons

Step-by-step explanation:

20+15=35

mario62 [17]3 years ago

3 0

Answer:

35 crayons.

(20 + 15 = 35)

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2 years ago

2+1.25f=10−2.75f solve for f

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Hey there!

2 + 1.25f = 10 - 2.75f
Add 2.75f to both sides.

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3 years ago

The coordinates of the endpoints of AB and CD are A(2,

Ratling [72]

Answer:

Option 1: CD is a perpendicular bisector of AB

Step-by-step explanation:

Let us find out the slopes of various line segments and the Distances and then we will draw the conclusions accordingly.

Formula to find slope

$m= \frac{y_2-y_1}{x_2-x_1}$

Formula to Find Distance between two points

$D=\sqrt{(y_2-y_1)^2+(x_2-x_1)^2}$

mAB ( represents , Slope of AB )

1. $mAC= \frac{3-2}{2-5}=\frac{1}{-3}=-\frac{1}{3}$

2. $mBC=\frac{2-1}{5-8}=\frac{1}{-3}=-\frac{1}{3}$

3. $mCD=\frac{5-2}{6-5}=\frac{3}{1}=3$

4. $AC=\sqrt{(3-2)^2+(2-5)^2} =\sqrt{(1)^2+(-3)^2}=\sqrt{1+9}=\sqrt{10}$

5. $BC=\sqrt{(2-1)^2+(5-8)^2} =\sqrt{(1)^2+(-3)^2}=\sqrt{1+9}=\sqrt{10}$

mAC = mBC , and C is common point , hence these three are collinear points making a straight line whole slope is $-\frac{1}{3}$

$mAB=-\frac{1}{3}$

$mCD=3$

$mAB \times mCD = -\frac{1}{3} \times 3 = -1$

Hence CD ⊥ AB

Also

From Point 4 and point 5 above , we see that

AC = CB

Hence CD bisect AB at C, also CD ⊥ AB

There fore

CD is a perpendicular bisector of AB

Therefor option 1 is true

4 0

2 years ago

Rita has 20 crayons.Nora has 15 more crayons than Rita.How many crayons does Nora have?​

Rita has 20 crayons.Nora has 15 more crayons than Rita.How many crayons does Nora have?