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Nastasia [14]
3 years ago
5

James answered 14 items correctly on a 16-item quiz. what percent did he answer correctly?

Mathematics
2 answers:
prisoha [69]3 years ago
6 0
To get your answer, divide 14 by 16.  Then, move the decimal place two places to the right and change it into a percentage. James scored about 86%.
Troyanec [42]3 years ago
3 0
So,

I like to simplify a fraction first.  This is what I do when I'm in a store trying to find the unit price.

\frac{14}{16}

Factor.
\frac{2*7}{2*2*2*2}

Cross out ones.
\frac{7}{2*2*2}

Multiply it out.
\frac{7}{8}

In my head, I remember that one-eighth is equal to 0.125.

So seven-eighths is equal to 0.125 times 7.
0.125 * 7 = 0.875

Convert to percent form.
0.875 --> 87.5%

James answered 87.5% of his quiz correctly.

I actually have the decimal equivalents for eighths in my head when I'm shopping.  So once I get seven-eighths, I immediately know how much that is.  I can also subtract 0.125 from 1.000 to get seven-eighths.
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BartSMP [9]

Answer:

53.3 rotations

Step-by-step explanation:

135/180=x/40

solve by cross multiply

7 0
2 years ago
If you flip three fair coins what is the probability that the two first flips will both be heads, and the third flip will be eit
Brrunno [24]

Answer:

The probability that a coin flip is a head or a tail is 0.5. The probability that a coin flip is either a head or a tail is 1. The probability that a three-coin-flip is two heads and a head or a tail is 0.25.

Step-by-step explanation:

5 0
3 years ago
Matrix a is a 6 × 5 matrix. which order of matrix can be multiplied by matrix a to create matrix ab?
mezya [45]

Order (B) 5 × 6 of the matrix can be multiplied by matrix a to create matrix ab.

<h3>What is a matrix?</h3>
  • A matrix is a rectangular array or table of numbers, symbols, or expressions that are organized in rows and columns to represent a mathematical object or an attribute of such an object in mathematics.
  • For instance, consider a matrix with two rows and three columns.

To find the order of matrix:

  • We must first check the dimension of two matrices, say matrix A by matrix B, before we may multiply them.
  • Multiplication is achievable if the number of columns in the first matrix, A, equals the number of rows in the second matrix.
  • Dimension is assigned to the provided matrix: 6 × 5
  • This means the given matrix contains six rows and five columns.
  • As a result, the second matrix MUST have 5 rows in order for multiplication to be POSSIBLE.
  • The only matrix with 5 rows among the above alternatives is the matrix with dimension (B) 5 × 6.

To prove:

  • In other words, the inner products of the dimensions should be equal.
  • That is; (a × b)(b × a) is possible but (a ×b)(c × b) is impossible.
  • The dimensions of the matrix are given by, row × column.

Therefore, order (B) 5 × 6 of the matrix can be multiplied by matrix a to create matrix ab.

Know more about matrix here:

brainly.com/question/24079385

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7 0
2 years ago
Kim has read 42 pages of a book. That is 20% of the total number of pages. How many pages long is Kim's book?
ki77a [65]
Hi there! The answer is 210 pages.

We can find our answer by looking at the proportions:
20 % is 42 pages.
10 % is 21 pages (42 / 2).
100% is 210 pages. (21 × 10).
4 0
3 years ago
Read 2 more answers
162 WATER BOTTLES IN 9 CASES =
4vir4ik [10]
Assuming this question is trying to enquire as to how many bottle of water there are in each case, you simply need to divide 162 by 9 to find the answer, which is that there are 18 bottles of water in each case.
7 0
3 years ago
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