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Bas_tet [7]
2 years ago
8

A science test has 20 questions. A student answers 80% of the questions correctly.

Mathematics
1 answer:
natita [175]2 years ago
8 0

Answer:

16 questions answered correctly

Step-by-step explanation:

Since the student answered 80% of the questions correctly, we can find 80% of 20 to answer this question.

[] First we will convert the percent into a decimal format;

80% / 100 = 0.8

[] Then we will multiply this by 20 to find our answer;

20 * 0.8 = 16 questions answered correctly

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-4x + 7 = -21 <br><br>whats x AHSAJ I NEEDD HELPPP
yKpoI14uk [10]

Answer:

-4x+7= -21

-4x= -21-7( this positive 7 will change to negative as we take in other side )

-4x = -28

Both the negative will be cancelled

4x = 28

x = 28/4

X = 7

therefore the X value is 7

7 0
3 years ago
Read 2 more answers
2.) Using any tool (Desmos or by hand on scratch paper) graph the inequality. Select 3 points. One point should
insens350 [35]
The line 6x - 2y = 12 goes through -6 on the y-axis and 2 on the x-axis ie through (0, -6) and (2, 0)
The line will be solid and shaded above (towards the origin)

There are an infinite number of choices for the example points!
Here is my selection.
(0, 0) is in the solution set. 6 x 0 - 2 x 0 = 0 which is less than 12
(5, 0) is not in the solution set. 6 x 5 - 2 x 0 = 30 which is greater than 12
(2, 0) is on the line. 6 x 2 - 2 x 0 = 12
5 0
3 years ago
the claim that 20% of americans know their credit score is tested. suppose that the sample evidence causes us to fail to reject
kipiarov [429]

Answer:

Conclusion : People ≠ 20% don't know about their credit score.

Step-by-step explanation:

Hypothesis is testing a statement for its statistical significance.

Null Hypothesis (H0)  implies 'no difference from tested value', Alternate hypothesis (H1)  implies 'significant difference from tested value'

Let % of people knowing their credit score = CS

H0 : CS = 20

H1 : CS  ≠  20

If the null hypothesis is rejected, it implies that we reject the claim that CS i.e '% of americans knowing their credit score = 20%'. So, the alternate hypothesis is accepted, i.e we conclude that '% americans knowing their credit score ≠ 20%'.

5 0
3 years ago
PLEASE HELP LIKE NOW!!!!!!!!!!!!!!
Alja [10]

Answer:

y  =  -7/2 + 5x/2

t = 3k/v

f = 9c/5 +32

Step-by-step explanation:

3 0
3 years ago
A man purchased a magazine at the airport for $2.69. The tax on the purchase was $0.13. What is the tax rate at the airport? The
alexdok [17]

We need to find the percent, let's start but making the equation.

The price is 2.69

The tax cost is 0.13

So what percent of 2.69 is = 0.13.

Equation: X/100 x 2.69 = 0.13

Multiply each side by 100 so we can get x alone with the price: 2.69x = 13

Now to get x alone, we must divide both sides by 2.69: x = 4.8

Finally, we just round 4.8 to the nearest whole number, which is 5 (5 or above give it a shove, 4 or below let it go, we have 8 so we give it a shove). This means that the answer will be 5%.

I hope this helps! :)

6 0
3 years ago
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