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Romashka-Z-Leto [24]
3 years ago
6

There were 55 questions on your chemistry exam , your score was a 94.5 %. how many questions did

Mathematics
1 answer:
pav-90 [236]3 years ago
6 0

Answer:

You got about 52 (~51.975) questions right on your chemistry exam

You got a 93.1% on your biology exam

Step-by-step explanation:

55 multiplied by 0.945 gives you about 52

And for the second part just divide 54/58 to get the percentage

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What is the equation of the line in slope-intercept form? <br><br> 12 points plz help!!!
Art [367]

Answer:  y=-2x-4

Step-by-step explanation:

The slope-intercept form of the line is:

y=mx+b

Where m is the slope and b the intersection with the y-axis.

You can see in the graph that line intersect the y-axis at y=-4, then:

b=-4

Choose two points and substitute them into the formula for calculate the slope. This is:

m=\frac{y_2-y_1}{x_2-x_1}

Let's pick the points (-4,4) and (-6,8). The the slope is:

m=\frac{4-8}{-4-(-6)}=\frac{-4}{2}=-2

Substituting into the equation, you get:

 y=-2x-4

6 0
4 years ago
The marked price of an article is Rs.2080. After allowing d% discount and levying
mash [69]

Answer:

13%

Step-by-step explanation:

<u>Given:</u>

  • MP = 2080
  • Discount = d%
  • VAT = (d-2)%
  • Cost = 1997.84

<u>Apply discount:</u>

  • 2080 - d% = 2080*(1 - 0.01d)

<u>Add VAT:</u>

  • 2080*(1 - 0.01d) + (d - 2)%
  • 2080*(1 - 0.01d) * (1 + (d -2)/100)
  • 2080*(1 - 0.01d) * (0.98 + 0.01d) = 1997.84
  • (1 - 0.01d)(0.98 + 0.01d) = 1997.84/2080
  • 0.98 + 0.01d - 0.0098d - 0.0001d² = 0.9605
  • - 0.0001d² + 0.0002d + 0.98- 0.9605 = 0
  • 0.0001d²- 0.0002d - 0.0195 = 0
  • d² - 2d + 195 = 0

<u>Solving the quadratic equation we get:</u>

  • d = 15

<u>Then</u>

  • VAT rate = 15 - 2 = 13%
7 0
3 years ago
A car can travel 480 miles on a full tank of petrol. The tank holds 60 litres. A driver fills the tank and sets off on a journey
strojnjashka [21]

Answer:

After travelling 360 miles, 15 litres of petrol will be left.

Step-by-step explanation:

If a car can travel 480 miles with a full tank of 60 liters of petrol, it could be said that each liter of petrol allows to travel 8 miles (480/60 = 8). Therefore, since the driver has driven his car for 360 miles, his tank has spent 45 liters of petrol (360/8 = 45). In conclusion, given that the tank has a capacity of 60 liters and that it was full at the time of departure, having spent 45 liters, 15 liters remain in the tank.

7 0
3 years ago
Two fathers and two sons enter a movie theater and pat ten dollars each. The ticket seller takes $30. What happened to the rest
atroni [7]

Answer:

they wont have any left

Step-by-step explanation:

think about grandfather, father, and son.

4 0
3 years ago
What is the mathematical notation for absolute value?​
alukav5142 [94]
Use vertical pipes around the value.

Example:

abs(-4) = |-4| = 4
4 0
3 years ago
Read 2 more answers
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