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2 years ago

In the diagram, the areas of ΔADC and ΔDCB are in a ratio of 3 : 4. What are the coordinates of point C?

Mathematics

2 answers:

Kisachek [45]2 years ago

5 0

(1/2(AC) * DC) / (1/2(BC) * DC) = 3/4
AC / BC = 3/4

The coordinate of C be (x, y), then
((4(1) + 3(8))/7, (4(-9) + 3(-2))/7) = ((4 + 24)/7, (-36 - 6)/7) = (28/7, -42/7) = (4, -6)

anygoal [31]2 years ago

5 0

I hope this helps you

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It’s less than 60 and greater than 55. If you add the digits the sum is 13.

labwork [276]

Between 60 and 55, 5+8=13

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2 years ago

Ms. Ortiz is painting her canoe. Two-fifths of gallon of paint covers ¼ of the canoe.

madreJ [45]

Answer: 8/5 or 1 3/5

Step-by-step explanation:

2/5 + 2/5 + 2/5 + 2/5

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6 0

2 years ago

Petra was given 12 yards of fabric to make costumes for the school play if each costume requires 1 1/2 yards how many costumes c

solmaris [256]

Petra can make 8 costumes with 12 yards of fabric

<h3><u>Solution:</u></h3>

Given that Petra was given 12 yards of fabric to make costumes for the school play

Each costume requires $1\frac{1}{2}$ yards

<em><u>To find: number of costume Petra can make</u></em>

The number of costume Petra can make is calculated by dividing the total fabric she has by fabric needed for one costume

$\text {number of costume Petra can make }=\frac{\text {total fabric she has }}{\text {fabric needed for one costume }}$

Total fabric she has = 12 yards

Fabric needed for 1 costume = $1\frac{1}{2} = \frac{2 \times 1 + 1}{2} = \frac{3}{2}$ yards

Therefore,

$\text {number of costume Petra can make }=\frac{12}{3 / 2}=\frac{12}{3} \times 2=8$

Thus petra can make 8 costumes with 12 yards of fabric

7 0

2 years ago

Chelsea made 15 of the 28 recipes she downloaded from the Internet. What percent of the recipes did she make?

Elanso [62]

Hello there!

28 recipes .......> 100%
15 recipes .......> x%

Cross multiply
28x = 15*100
28x = 1500
x= 1500/28
x ≈ 53.5%

She makes 53.5% of the recipes.

I hope that helps!

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2 years ago

HOW do I solve these questions?

weeeeeb [17]

Okkk

Step-by-step explanation:

1. 5(1+9v)=5+5x9v=5+(5x9v)=5+45v

2.(20:4/12:4)=4(5b+3)

4 0

3 years ago

Read 2 more answers