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2 years ago

How the use a parentheses in an equation affect the answer

Mathematics

1 answer:

seraphim [82]2 years ago

5 0

Parentheses affect how equations are done.

EX. 1+1*4
4+1=5

VS

(1+1)*4
2*4=8

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A painter charges $15.53 per hour, plus an additional amount for the supplies. If he made $157.80 on a job where he worked 5 hou

Bingel [31]

Answer:

$80.15

Step-by-step explanation:

We can make an equation to solve this problem, that helps a lot. If h represented hours, we could make the equation 15.53h+s=157.8

Now we know that he worked 5 hours, so we can multiply 15.53 by 5 to simplify the equation.

15.53*5=77.65

So now the equation is 77.65+s=157.8.

Now, we can subtract 77.65 from both sides.

So now, our final equation is s=80.15

It cost $80.15 to buy supplies.

Hope this helps!

6 0

3 years ago

Select the correct answer. x Probability 0 0.2 1 0.1 2 0.4 3 0.2 4 0.1 The probability distribution of x, a discrete random vari

Alex_Xolod [135]

Answer: The option B. 1.9 is correct

Explanation:

We are given the below information:

x Probability P(x)

0 0.2

1 0.1

2 0.4

3 0.2

4 0.1

The expected value of x is given below:

$E(x)=\sum x P(x)$

$=(0 \times 0.2)+(1 \times 0.1)+(2 \times 0.4)+(3 \times 0.2)+(4 \times 0.1)$

$=0+0.1+0.8+0.6+0.4$

$=1.9$

Therefore, the expected value of x is 1.9

7 0

3 years ago

Who can tell me what all the prime numbers are,please!!!!!!!!!!!!!

Oxana [17]

There are an infinite amount of prime numbers plz be more clear on the range

8 0

3 years ago

Read 2 more answers

Ned help please ASAP!!!!!

Lubov Fominskaja [6]

The answer would be a (not too sure) but it makes a little bit sense

4 0

2 years ago

I think of a number , multiply it by 3, add 4 and square the result

bazaltina [42]

Answer:

${(3x + 4)}^{2}$

Step-by-step explanation:

thinked number = x

multiply by 3

$x \times 3 \\ = 3x$

add 4

$3x + 4$

square the result

${(3x + 4)}^{2}$

hope this helps

brainliest appreciated

good luck! have a nice day!

4 0

2 years ago

Read 2 more answers