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Mashutka [201]
3 years ago
15

PLEASE HELP AS SOON AS POSSIBLE Sunny earns $22.75 per week delivering newspapers. He worked as a delivery boy for 3 weeks. He a

lso earned $32.75 last month doing chores around the house. He spent $14.25 of his total earnings to download music on his mobile device. Sunny put 1 over 5 of the remaining money in his savings account. Sunny used the following steps to find the total money he put in his savings account:
Step 1: [($22.75 + 3) + $32.75 − $14.25] ⋅ 1 over 5

Step 2: [$44.25] ⋅ 1 over 5

Step 3: $11.0625

In which step did Sunny first make an error? Use words to explain how Sunny can correct his error
Mathematics
1 answer:
Pavlova-9 [17]3 years ago
4 0
Step 1 he had to multiply the $22.75 times 3 weeks it should have been 
($22.75 x 3) + $32.75 - $14.25
$68.25 + 32.75 - $14.25
$86.75
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3 years ago
On the subway 8 out of 11 people are carrying a briefcase.Based on this information, if there are 700 people on the subway, then
Scorpion4ik [409]

Answer:

191 people do not have a briefcase

Step-by-step explanation:

Proportion states that the two ratios or fraction are equal  

As per the given condition:

On the subway 8 out of 11 people are carrying a briefcase.

⇒Total number of people = 11

and number of people carrying a briefcase = 8

Remaining number of people that do not carrying a briefcase = 11-8 = 3

Now,

Based on this information, if there are 700 people on the subway

Let x be the number of people do not have a briefcase

By definition of proportion :

\frac{3}{11} = \frac{x}{700}

Multiply 700 both sides, we have

\frac{3}{11} \times 700 = x

Simplify:

x = 190.90≈ 191

Therefore, 191 people do not have a briefcase

5 0
3 years ago
Read 2 more answers
Need help ASAP will give brainliest
suter [353]

Answer:

the second one :)

Step-by-step explanation:

6 0
3 years ago
20 points!!
ANEK [815]

See below for the proof of the equation \frac{ax + by}{x + y} - \frac{ax - by}{x - y}= 2(a - b)

<h3>How to prove the equation?</h3>

The equation is given as:

\frac{ax + by}{x + y} - \frac{ax - by}{x - y}= 2(a - b)

Take the LCM

\frac{(ax + by)(x - y) -(ax - by)(x + y)}{(x + y)(x - y)}= 2(a - b)

Expand

\frac{ax^2 - axy + bxy - by^2 -ax^2 - axy + bxy + by^2}{(x + y)(x - y)}= 2(a - b)

Evaluate the like terms

\frac{-2axy + 2bxy }{(x + y)(x - y)}= 2(a - b)

Rewrite as:

\frac{-2axy + 2bxy }{x^2 - y^2}= 2(a - b)

Factorize the numerator

\frac{2(a - b)(x^2 - y^2)}{x^2 - y^2}= 2(a - b)

Divide

2(a - b)= 2(a - b)

Both sides are equal

Hence, the equation \frac{ax + by}{x + y} - \frac{ax - by}{x - y}= 2(a - b) has been proved

Read more about equations at:

brainly.com/question/2972832

#SPJ1

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2 years ago
Marco wants to set up 12 small wind turbines with 3 blades each. If 4 wind turbine blades cost $79.74, how much will all the bla
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So, 4 x 3 is 12, so 4 blades cost 79.74 x 3 (because every turbine has 3 blades each) is 318.96

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