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Degger [83]
3 years ago
15

Find the size of each missing angle. (image attached)

Mathematics
2 answers:
zubka84 [21]3 years ago
7 0

Answer:

a is right angle

Step-by-step explanation:

ozzi3 years ago
4 0
A-110
b-75
c-128
d-78
e-58
f-71
You might be interested in
If a number is increased by its square, the result is 72 find the number
gregori [183]
Translating into a mathematical equation:

n + n^2 = 72

Rewriting,    n^2 + n - 72 = 0
Factoring,    (n+9)(n-8) = 0
Solving for n:  n = -9 or n = 8

You must check both answers before accepting one, the other or both.

Example:  suppose we check out n = 8.  Then  8 + 8^2 = 72 is true, and n = 8 is a solution.  Is n = -9 a solution?  Try it.
8 0
3 years ago
Please help I’m desperate
JulijaS [17]

Answer:

#2 is 512mm³

#3 is 120m³

Step-by-step explanation:

#2

8³ which # 8×8×8=512mm³

#3 v=bh

v=20×6

v=120m³

4 0
3 years ago
The set of the consecutive odd numbers 1, 3, 5, 7, ... , N has a sum of 400. How many numbers are in the set?
Amanda [17]

Well, we could try adding up odd numbers, and look to see when we reach 400. But I'm hoping to find an easier way.

First of all ... I'm not sure this will help, but let's stop and notice it anyway ...
An odd number of odd numbers (like 1, 3, 5) add up to an odd number, but
an even number of odd numbers (like 1,3,5,7) add up to an even number.
So if the sum is going to be exactly 400, then there will have to be an even
number of items in the set.

Now, let's put down an even number of odd numbers to work with,and see
what we can notice about them:

         1, 3, 5, 7, 9, 11, 13, 15 .

Number of items in the set . . . 8
Sum of all the items in the set . . . 64

Hmmm.  That's interesting.  64 happens to be the square of 8 . 
Do you think that might be all there is to it ?

Let's check it out:

Even-numbered lists of odd numbers:

1, 3                                   Items = 2, Sum = 4
1, 3, 5, 7                           Items = 4, Sum = 16
1, 3, 5, 7, 9, 11                 Items = 6, Sum = 36
1, 3, 5, 7, 9, 11, 13, 15 . . Items = 8, Sum = 64 .

Amazing !  The sum is always the square of the number of items in the set !

For a sum of 400 ... which just happens to be the square of 20,
we just need the <em><u>first 20 consecutive odd numbers</u></em>.

I slogged through it on my calculator, and it's true.

I never knew this before.  It seems to be something valuable
to keep in my tool-box (and cherish always).


3 0
3 years ago
(-4)(2)+(-3)(6) what would it be a positive or a negative
maw [93]
It would be negative 26
6 0
4 years ago
Read 2 more answers
Use a t-distribution to answer this question. Assume the samples are random samples from distributions that are reasonably norma
Dimas [21]

Using the t-distribution, it is found that the proportion in a t-distribution less than −1.4 if the samples have sizes n1=30 and n2=40 is of 0.083.

<h3>How to find a proportion in a t-distribution?</h3>

The proportion is found using a calculator, with three inputs:

  • The tail of the test, if it is left, right, or two-tailed.
  • The test statistic.
  • The amount of degrees of freedom.

In this problem, we have a left-tailed proportion, as we want the proportion that is less than a value, with test statistic t = -1.4 and 30 + 40 - 2 = 68 df, hence the proportion is of 0.083.

More can be learned about the t-distribution at brainly.com/question/16162795

#SPJ1

8 0
3 years ago
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