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3 years ago

I need help with these two please and thank you

Mathematics

1 answer:

Stells [14]3 years ago

4 0

Answer:

Question 3: A: 628.32

Question 4: C: 2,854.14

Step-by-step explanation:

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Answer:

i think 1/300

Step-by-step explanation:

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3 years ago

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(4x+8)+(2x+20)=90 help me solve this and draw a diagram

Lemur [1.5K]

Answer:

x = 31/3

Step-by-step explanation:

4x+8+2x+20=90

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3 years ago

4 - 5/2 * (1/10x) = 1 what is the value of x

Inga [223]

$4 - 5 / 2 * (1/10x) = 1\\$

The first step is to identify the order in which the equation must be solved, by following PEMDAS (you might know it as BEDMAS):

Parenthesis (or Brackets)

Exponents

Multiplication and Division

Addition and Subtraction

My advice would be to add parenthesis, following these rules, if you are not very good at finding them immediately by sight.

So:

$4 - 5 / 2 * (\frac{1}{10x}) = 1\\\\4 - [(5/2)*(\frac{1}{10x})]=1\\\\4-(2.5*\frac{1}{10x})=1\\\\4-\frac{2.5}{10x}-1=0\\3-\frac{x}{4}=0\\\frac{x}{4}=3\\x=3*4\\x=12$

We check our answer:

$x=12\\4 - [(5 / 2) * (1/10)*(x)] = 1\\4 - [(5 / 2) * (\frac{1}{10}) * (12))] = 1\\4 - [2.5 * (\frac{1}{10})*12] = 1\\4 - [(\frac{2.5}{10})*12] = 1\\4 - [(\frac{1}{4})*12] = 1\\4 - 3 = 1\\1=1$

We are right!

So, $x=12$ .

6 0

4 years ago

What is 98765432-1? Really appreciate you helping me get rid of my points!

larisa [96]

Answer:

98765431 is the answer

Step-by-step explanation:

This took me a very long time to complete so your welcome ;)

5 0

3 years ago