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Olenka [21]
3 years ago
10

Which of these are mathematical laws that help us solve numerical problems? A. decimals B. graphs C. formulas D. percentages E.

fractions
Mathematics
2 answers:
liq [111]3 years ago
7 0
<h2>Hello!</h2>

The answer is C. formulas

<h2>Why?</h2>

Formulas are laws o conditions that help us when we are solving numerical problems, we use them to relate number/variables in order to found equivalence between what we are calculating and the information we have.

A formula can include constants, variables and always contain an equality, this last one will help us to establish the needed equivalence to solve numerical problems.

Discarding the other given options:

A. decimals: Incorrect, decimals are a type of number which is not whole numbers.

B. graphs: Incorrect, graphs are graphical tools that we can use to show information or data.

D. percentages: Incorrect, percentages are used to show numerical information as a fraction of 100 units.

E. fractions: Incorrect, like decimals, fractions are a type of number which is not whole numbers, fractions are represented by a division of a number into another, representing just a part of a determinate whole number.

Have a nice day!

kirill115 [55]3 years ago
3 0
<h2>Answer:</h2>

<u>The correct answer is </u><u>C) Formulas</u>

<u></u>

<h2>Step-by-step explanation:</h2>

Formula is a problem-solving technique that students can use to find answers to math problems involving geometry, percents, measurement, or algebra. To solve mathematical numerical problems, one should use appropriate formula and substitute data in the correct places of a formula to find the required results. If there is a slight mistake in the formula everything goes wrong.

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VladimirAG [237]

you spend 28 and want 20 profit

28 +20 = 48 total

48/4 = 12

answer is D, you need to sell 12 containers

3 0
3 years ago
If cosA=4/5 and cosB=3/5 then find a,b,c
aliya0001 [1]

Answer:

a = 3, b = 4, c = 5

Step-by-step explanation:

Assuming we're working with a right triangle, where c is the hypotenuse, then using the definition of the cosine being the adjacent side over the hypotenuse, then we know:

a = 3, because it is the side adjacent to B

b = 4, because it is the side adjacent to A

c = 5, because it is the denominator in bot fractions

This of course assumes that there is no additional ratio in place.  For example, if the lengths were instead 8, 6 and 10 respectively, then the cosines given would still be 4/5 and 3/5.  Truthfully these only tell relative sizes of the sides, and not their absolute sizes.

3 0
3 years ago
Read 2 more answers
Given A= <br> What is the value of matrix B if A + B = C
tangare [24]

Answer:

A

Step-by-step explanation:

We know that 8+3x= x

solve for x

8= -2x

-4 =x

The only answer that has -4 is A

6 0
3 years ago
Help me pls math genius
Alecsey [184]

Answer:

x = -3

y = -1

Step-by-step explanation:

in the given question :-

=》x - 4y = 1

=》x = 4y + 1

now replacing the value of x as ( 4y + 1 ) in equation (2)

=》3x + 2y = -11

=》3 (4y + 1) + 2y = -11

=》12y + 3 + 2y = -11

=》14y = -11 - 3

=》y = -14 ÷ 14

=》y = -1

now, putting the value of y in equation (1)

=》x - 4y = 1

=》x - ( 4 × -1 ) = 1

=》x + 4 = 1

=》x = 1 - 4

=》x = -3

6 0
3 years ago
Read 2 more answers
Ab over 2 equal 2a minus 1,express a in terms of b
sasho [114]

\frac{ab}{2} = 2a - 1

2(\frac{ab}{2}) = 2(2a - 1) <em>multiplied both sides by 2 </em>

ab = 4a - 2 <em>distributed the 2 on the right side</em>

ab - 4a = -2 <em>subtracted 4a from both sides</em>

a(b - 4) = -2 factored out "a" from the left side

a = \frac{-2}{b - 4} <em>divided (b - 4) on both sides</em>

Answer: a = \frac{-2}{b - 4}

6 0
3 years ago
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