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yulyashka [42]
2 years ago
12

Martha estimated there were 83 marbles in a jar for a contest. The actual number of marbles in the jar was 105. What was the per

cent error of Martha's estimation?
Mathematics
1 answer:
Luba_88 [7]2 years ago
4 0

Answer:

26.5%

Step-by-step explanation:

i did the math, that answer should be correct, but the question is stated  strange.

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In a class of all girls, 22 of the 28 students have brown hair. What is the
Verdich [7]

Answer:

\frac{3}{14}

Step-by-step explanation:

Total Students = 28

Brown Hair = 22

NOT Brown Hair = 28 - 22 = 6

The probability of an event is the number of that event divided by total number.

So, let denote probability of without brown hair be  P(NOT BROWN). So, we can say:

P(NOT BROWN) = 6/28

Reducing, we get:

P(NOT BROWN) = 3/14

4 0
3 years ago
Linda read 1/5 of a book on Friday and 2/7 of the book on Saturday. On Sunday she read 5/9 of the remaining pages. What fraction
insens350 [35]
Here, you just want to solve it by finding a common denominator.
1/5+2/7, because she read 1/5 and 2/7 of the book on separate days. The common denominator is 35.
7/35+10/35
=17/35
So that's how much of the book she read before Saturday.
Now it says that on Sunday she read 5/9 of the remaining pages, meaning:
1-17/35 should give us our answer
35/35-17/35=18/35
But since it says she read 5/9 of the remaining pages, we need to multiply 18/35 by 5/9 to get what 5/9ths of 18/35 is.
(18/35)(5/9)=2/7
Therefore she read 2/7ths of the book on Sunday.
3 0
3 years ago
Find the equation of the straight line that passes through the points (1, 10) and (3, 2)
slava [35]

Answer:

y = -4x+14

Step-by-step explanation:

First find the slope

m = (y2-y1)/(x2-x1)

m = (2-10)/(3-1)

  =-8/2

  = -4

The slope intercept form of a line is

y = mx+b where m is the slope and b is the y intercept

y = -4x+b

Substitute a point into the equation

10 = -4(1)+b

Add 4 to each side

14 = b

y = -4x+14

8 0
3 years ago
Read 2 more answers
If Sin X equals .52" and cos X equals .85 what is cot X
Maslowich
Cot x = cos x / sin x = 0.85 / 0.52 =  1.6346
4 0
3 years ago
What’s the perimeter?
uysha [10]

Answer:

answer 60,40 i think

Step-by-step explanation:

the perimiter is the outside of an object, when finding the perimiter you add the suroundding together, when it comes to area you multiply

7 0
3 years ago
Read 2 more answers
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