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3 years ago

Sue answers 43 out of 60 questions correctly. What percentage of her answers are incorrect?

Mathematics

2 answers:

eduard3 years ago

8 0

Answer:

28 1/3 %

Step-by-step explanation:

60-43 = 17 answers INCORRECT

17/60 * 100 = 28 and 1/3 %

nirvana33 [79]3 years ago

8 0

Answer: 28.(3) 3 is repeating

Step-by-step explanation: When we start this problem, we should find out what answers Sue answered incorrectly. Since the problem already tells us that she answered 43 of them correctly(out of 60), all we need to do is subtract: 60-43

That’s when we learn that Sue answered 17 of the 60 questions incorrectly. Now, we need to convert 17/60 into a percentage.

If you didn’t know, in order to convert a fraction into a percentage, you have to first divide the numerator by the denominator, then multiply by 100.

So, 17 divided by 60 will give us 0.28(3). (The reason I put a parenthesis around 3 is that it is a repeating number). After, we have to multiple that decimal by 100 or simply move the decimal point by 2 places. Therefore, we get: 28.(3)

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When the two equations are graphed on a coordinate plane, they intersect at two points.

Law Incorporation [45]

Answer:

(0,4) and (-2,0)

Step-by-step explanation:

y=3x²+4x+4

y = -2x +4

3x²+4x+4 = - 2x +4

3x²+6x=0

3x(x+2)=0

x=0, x= -2

x=0, y=-2x+4= -2*0 + 4 =4, (0,4)

x= - 2, y = 2x + 4= 2*(-2) +4=0, (-2,0)

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3 years ago

Consider a $2 principal investment with a 10% annual simple interest rate. Enter the simple interest equation that represents th

PtichkaEL [24]

The simple interest equation that represent the situation is A = t/5

<h3>What is simple interest?</h3>

Simple Interest (S.I.) is the method of calculating the interest amount for a particular principal amount of money at some rate of interest. For example, when a person takes a loan of 500 dollars, at a rate of 10 per annum for two years, the person's interest for two years will be S.I. on the borrowed money.

Principal(P) borrowed = $2

Rate(R) in percentage = 10

time in years = t

Simple interest(A) = P X R X t / 100

A = 2 X 10 X t/ 100

After reducing 20/100 to the lowest term

A = t/5

In conclusion the simple interest(A) = t/5

Learn more about simple interest: brainly.com/question/20690803

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1 year ago

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3 years ago

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3 years ago

Find a positive number that equals 42 when added to it's square

Schach [20]

if the number is x, then

the positive number, when added to its square (remember, its=posessive and it's is a constraction), equals 42

this can be writen as $x+x^2=42$

perfect, we need to solve by making one side 0 and then factoring since if ab=0, we can assume and solve for a and b by saying that a=0 and b=0

minus 42 from both sides

$x^2+x-42=0$

now, either use the quadratic formula or complete the square or factor

I will factor

find what 2 numbers multiply to get -42 and add to get 1 (since the linear coefient is 1 and the constant is -42)

those numbers are -6 and 7

$x^2+x-42=0$

factor

$(x-6)(x+7)=0$

set each to 0

x-6=0

x=6

x+7=0

x=-7, false since we wanted a positive number

the number is 6

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3 years ago