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3 years ago

Hanna lost 4 points on a test and earned 4 points on an extra-credit question

Mathematics

1 answer:

laiz [17]3 years ago

4 0

Answer:

the total points earned and lose cancel eachother out to be 0. she did not lose any points

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Please help! acellus

ch4aika [34]

Answer:

The number that belongs in the green box is equal to 909.

General Formulas and Concepts:
Algebra I

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Trigonometry

[Right Triangles Only] Pythagorean Theorem:
$\displaystyle a^2 + b^2 = c^2$

a is a leg
b is another leg
c is the hypotenuse

Step-by-step explanation:

Step 1: Define

Identify given variables.

a = 30

b = 3

c = x

Step 2: Find x

Let's solve for the general equation that allows us to find the hypotenuse:

[Pythagorean Theorem] Square root both sides [Equality Property]:
$\displaystyle \begin{aligned}a^2 + b^2 = c^2 \rightarrow c = \sqrt{a^2 + b^2}\end{aligned}$

Now that we have the formula to solve for the hypotenuse, let's figure out what x is equal to:

[Equation] Substitute in variables:
$\displaystyle \begin{aligned}c & = \sqrt{a^2 + b^2} \\x & = \sqrt{30^2 + 3^2}\end{aligned}$
Evaluate:
$\displaystyle \begin{aligned}c & = \sqrt{a^2 + b^2} \\x & = \sqrt{30^2 + 3^2} \\& = \boxed{ \sqrt{909} } \\\end{aligned}$

∴ the hypotenuse length x is equal to √909 and the number under the square root, our answer, is equal to 909.

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Learn more about Trigonometry: brainly.com/question/27707750

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Topic: Trigonometry

3 0

2 years ago

Pre-image point N (6,-3) was dilated to point N(2,-1) What was the scale factor used?

tangare [24]

Answer:
The scale factor is 1/3

Explanation:
Given that the original point is has coordinates (x,y) and that the dilated point has coordinates (x',y'), we can see that:
x' = k * x
y' = k * y
where k is the scale factor

Now, for the given point we have:
original point = (6 , -3)
dilated point = (2 , -1)
Now, applying the above formula, we will find that:
For x-coordinate:
2 = k * 6
k = 2/6
k = 1/3
Check using the y-coordinate:
-1 = k * -3
k = -1 / -3
k = 1/3

From the above, we can confirm that:
k = 1/3

Hope this helps :)

3 0

3 years ago

Help please and why

Zarrin [17]

A hopes that helps
Because with you divided 16 1.25

8 0

3 years ago

Can someone help with these 2 questions of percent increase and decrease? thanks!

Lady bird [3.3K]

Answer:

15. -42 16.13

Step-by-step explanation:

For positive numbers Absolute change (actual difference) = Percentage increase and For positive numbers Absolute change (actual difference) =

- 1 × Percentage decrease

5 0

2 years ago

Read 2 more answers

At a local department store, sweaters are typically priced at $25. Due to a special, the sweaters are reduced to 80% of their or

WITCHER [35]

Multiply 25 by .80 and subtract that number from $25.
25x0.80= 20. 25-20= $5
Hope I helped!

4 0

4 years ago

Hanna lost 4 points on a test and earned 4 points on an extra-credit question​

Hanna lost 4 points on a test and earned 4 points on an extra-credit question