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VLD [36.1K]
3 years ago
9

Find BC if B(8,-7) and C1-4,-2).

Mathematics
1 answer:
Alika [10]3 years ago
4 0

Using distance formula :

  • \sqrt{(x_2 - x_1) {}^{2}  + (y_2 - y_1) {}^{2} }

  • \sqrt{(8 - ( - 4)) {}^{2}  + ( - 7 - ( - 2)) {}^{2} }

  • \sqrt{(12) {}^{2} + ( - 5) {}^{2}  }

  • \sqrt{144 + 25}

  • \sqrt{169}

  • 13 \:  \: units
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Question 3
Likurg_2 [28]

Answer:

27cm

Step-by-step explanation:

first, separate the 2 shapes you will find the area too. these would be the little 3 by 3 block sticking out on top, and the other piece.

to find the area, you have to do length times width.

you can start off with the 3 by 3 block. 3 times 3 = 9cm

next, you have to find the measurements of the rectangular shape. we know the width is 6cm. and the length of the whole shape is also 6cm. but we can take off the 3cm from the other shape. we now have 3cm leftover to be the length for the rectangle.

we can now find the area for the rectangle. 6 times 3 = 18cm.

last but not least, we can add the 2 measurements up to get the area of the whole shape. 9 + 18 = 27cm.

8 0
3 years ago
HELP PLEASE<br> 3. Write the ratio 12/25 as a percent.
Dennis_Churaev [7]

Answer:

The answer to your question would be

48%

hope this helps

can i get brainliest?

Step-by-step explanation:

12/25 x 100 = 0.48 x 100 = 48%

3 0
3 years ago
Which of these is a unit of density?<br> km/m<br> kg/m?<br> kg/m<br> kg/m
Zielflug [23.3K]

Answer: Kg/m³

Step-by-step explanation: Mass/ Volume

5 0
3 years ago
Read 2 more answers
Please help me with 13 and 15 asap
Law Incorporation [45]
Gosh, I've done this problem before. Let's start with 13. In this problem, we're basically just skip counting. For example, in the roses row, in the second bouquet, we know we have to add 4 more flowers, so we can document 8. Continue to skip count for both. For 15, we would have about 96 more movie posters remaining, making our ratio 96:x. So, 96:x = 120:100. Therefore, x would equal 80- as 96:80 equals 120:100. If she needs 80 and already had 100, she should sell 20 posters. Hope this helped.
3 0
3 years ago
Factorise 9y^2-66yz+121z^2 plss answer with steps plss
aksik [14]

Answer:

(3y - 11z)2

Step-by-step explanation:

hahaha hello again

8 0
3 years ago
Read 2 more answers
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