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Rainbow [258]
3 years ago
8

alyssa answered 90% of her math test correctly. there were 50 questions on the test. how many questions did alyssa answer correc

tly?
Mathematics
1 answer:
marissa [1.9K]3 years ago
8 0
Since she answered 90% of her quiz correct, that means if she were to answer 10 questions, 9 would be correct. Lucky for us, 50 is a multiple of 10. If you multiply 10 by 5, you'd get 50. You would also need to multiply 9 by 5 as well. When you do this you'd get

45/50 correct. (divided them to make sure you get .90 if so, I'm right :)
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Find the domain and range of function f(x) is equal to root √x-1
Vladimir79 [104]

Answer:


Step-by-step explanation:

If you meant f(x) = √x - 1, then the domain is [0, infinity).

If you meant f(x) = √(x-1), then the domain is [1, infinity).

When any ambiguity may rear its ugly head, use parentheses, as indicated here.

7 0
4 years ago
Solve the equation<br> (x-3)^3-( x - 1 )^3 + 7x^2 = 7(3x - 4 )
Yakvenalex [24]

Answer:

x= -1 or x = -2

Step-by-step explanation:

Your equation:

(x−3)^3−(x−1)^3+7x^2=7(3x−4)

Step 1: Simplify both sides of the equation.

x^2+24x−26=21x−28

Step 2: Subtract 21x-28 from both sides.

x^2+24x−26−(21x−28)=21x−28−(21x−28)

x^2+3x+2=0

Step 3: Factor left side of equation.

(x+1)(x+2)=0

Step 4: Set factors equal to zero.

x+1=0 or x+2=0

which equals to x=−1 or x=−2

8 0
3 years ago
What is the equivalent fraction of 4/8​
Svetradugi [14.3K]

Answer:

2/4

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8 0
3 years ago
Read 2 more answers
With which set of information can you construct a unique triangle?
Marina CMI [18]
The answer is the lengths of all the sides/D you welcome
4 0
3 years ago
What's the greatest common factors of 55 and 77?
evablogger [386]
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The factors of 77 are 1, 7, 11, and 77 .

The factors that are common to both numbers are 1 and 11 .

The greatest one is  <em>11</em> .


You asked for the "greatest", so you only get one of them.  If there were
more than one greatest, then you'd want to know which greatest was
greater than the other greatest.
6 0
3 years ago
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