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In-s [12.5K]
3 years ago
13

Barak spent $20 at the Arcade This represents 10% of the money he earned working at the pizza parlor last week. How much money d

id he make at the pizza parlor last week?
Mathematics
2 answers:
AleksandrR [38]3 years ago
8 0
$200. since $20 is 10% then $40 would be 20% etc.
iragen [17]3 years ago
3 0
He made 200 dollars at the pizza parlor
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.. 10 is what percent of 7? Round the nearest whole percent.
romanna [79]

Answer:

143%

Step-by-step explanation:

\frac{10}{7}x100=142.9%=143%

7 0
3 years ago
Solve this equation for x. Round your answer to the nearest hundredth. 0.69=log x
Musya8 [376]
See photo for solution

7 0
3 years ago
Sarah kicked a ball in the air. The function
Aleksandr-060686 [28]

Answer: The ball hits the ground at 5 s

Step-by-step explanation:

The question seems incomplete and there is not enough data. However, we can work with the following function to understand this problem:

f=30 t- 6t^{2} (1)

Where f models the height of the ball in meters and t the time.

Now, let's find the time t when the ball Sara kicked hits the ground (this is when f=0 m):

0=30 t- 6t^{2} (2)

Rearranging the equation:

6t^{2}-30 t=0 (3)

Dividing both sides of the equation by 6:

t^{2}-5 t=0 (4)

This quadratic equation can be written in the form at^{2}+bt+c=0, and can be solved with the following formula:  

t=\frac{-b \pm \sqrt{b^{2}-4ac}}{2a} (5)  

Where:  

a=1  

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c=0  

Substituting the known values:  

t=\frac{-(-5) \pm \sqrt{(-5)^{2}-4(1)(0)}}{2(1)} (6)  

Solving we have the following result:

t=5 s  This means the ball hit the ground 5 seconds after it was kicked by Sara.

6 0
3 years ago
Nine less than three times a number is greater than forty
pentagon [3]
Start with an equation.
Nine less... so -9
3 times a number = 3x
Greater than 40 is >40

So put together is 3x-9>40
When solving I imaging the greater than sign as an equal sign. Less confusing.
3x-9=40
3x=49
x>49/3
7 0
3 years ago
Given: f(x) = 2x + 5, match the inputs with their outputs.
bekas [8.4K]
Yeah the answer is number 5
3 0
3 years ago
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