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iragen [17]
3 years ago
7

30 POINTS!! Will give brainliest What is ​ BC ​ ? Enter your answer in the box. units

Mathematics
2 answers:
andreev551 [17]3 years ago
6 0

Answer:

The answer would be - BC is 25

Step-by-step explanation:

  • Sides ab and ac are equal
  • 4 x + 1 = 2x +23
  • then after that you subtract 2 times from every side
  • 2x + 1 = 23
  • Then 1 more time from every side
  • 2x =22
  • Then divide by 2 on each side of the Triangle
  • x =11
  • BC = 3x -8
  • After you do all of this then you would sub. the  value of x
  • So BC = 3*11 -> 33 -8
Gemiola [76]3 years ago
4 0

Answer:

BC=25

Step-by-step explanation:

this is an isosceles  triangle, so sides AB and sides AC are equal

AB = AC

4x+1 = 2x+23

subtract 2x from each side

2x+1 = 23

subtract 1 from each side

2x =22

divide by 2 on each side

x =11

BC = 3x-8

substitute the value of x

BC = 3*11 -8

BC = 33 -8

BC=25


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What is the total of 4/7 +3/7
lilavasa [31]

Answer:

7/7 also known as a whole (1)

Step-by-step explanation:

All you have to do is add 4 and 3 then keep the denominator the same (7)

6 0
3 years ago
Jim is clearing out trees and planting grass to enlarge his backyard. He plans to double both the width and the length of his cu
Ierofanga [76]
U should know the area of rectangle is w*l
if we increase it by double or times 2 its area  will be
A=2w*2wl
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Now u can get the answer
4 0
3 years ago
Ms. Chen is planning to take her camp group on a field trip to Pottery Bayou where each person will create her own piece of art
erica [24]

Answer:

1. C=21x.

2. C=(8x+104).

Step-by-step explanation:

Let the number of people in the group be x. Denote the total cost as C.

1. If the regular cost is $21 per person, then the total regular cost for x people is C=21x.

2. If the special cost is $8 per person, then the total special cost for x people is \$8x. There is an additional $104 fee for a private room, thus the total special cost is C=(8x+104).

3 0
3 years ago
Victoria buys two pair of sunglasses for $8 each. About how much did she pay for both pairs of glasses? Round to the nearest ten
kumpel [21]

Victoria buys 2 pairs of sunglasses for $8 each

1 pair of glasses = $8

8 x 2 = total amount

multiply

8 x 2 = 16

total amount = 16

She payed $16 for both pairs of glasses.

hope this helps

7 0
3 years ago
Read 2 more answers
A survey of 132 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take
ddd [48]

Answer:

For 90% CI = (0.428, 0.572)

For 98% CI = (0.399, 0.601)

The confidence interval (and Margin of error) reduces when 90% confidence level is used compared to when 98% confidence level is used.

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

p+/-z√(p(1-p)/n)

Given that;

Proportion p = 66/132 = 0.50

Number of samples n = 132

Confidence level = 90%

z(at 90% confidence) = 1.645

Substituting the values we have;

0.50 +/- 1.645√(0.50(1-0.50)/132)

0.50 +/- 1.645√(0.001893939393)

0.50 +/- 0.071589436011

0.50 +/- 0.072

(0.428, 0.572)

The 90% confidence level estimate of the true population proportion of students who responded "yes" is (0.428, 0.572)

For 90% CI = (0.428, 0.572)

For 98% CI = (0.399, 0.601)

The confidence interval (and Margin of error) reduces when 90% confidence level is used compared to when 98% confidence level is used.

7 0
3 years ago
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