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kramer
3 years ago
13

What is the median test score? A)2.5 B)2 C)3 D)5

Mathematics
2 answers:
katovenus [111]3 years ago
6 0

Sorry to interrupt darling but I would need the test scores graph so I can answer this question if you could send me a screenshot of the question AND the graph I would be more than happy to help!!

EleoNora [17]3 years ago
5 0
It depends on the number of questions then you see how many points each question is
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What is the supplement to an angle that measures 58 degrees? <br>a) 180<br>b)122<br>c)132<br>d)58​
skelet666 [1.2K]

Answer:122

Step-by-step explanation:

Supplementary just means two angles sum to 180.

3 0
3 years ago
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help please !!!Kevin wants to make a mixture that is 50% lemon juice and 50% lime juice. How much 100% lemon juice should he add
Liula [17]
So basically, he wants to make mixture where lemon=lime

it is 6 gallons so
40% of 6=0.4 times 60=2.4=lemon
60% of 6=0.6 times 60=3.6=lime
so to make them equal
3.6-2.4=1.2
he must add 1.2 gallons of 100% lemon juice to make a mixture of 50% lemon and 50% lime

1.2 gallons is the answer
8 0
3 years ago
Use the coordinates of the plotted points to complete the calculation below. Pay attention to negative signs
Alex787 [66]

answer:

-1/2

explanation

1-2 / 4-2 = -1/2

4 0
3 years ago
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A parallelogram PQRS is divided in two triangles by diagonal SQ
stiv31 [10]

Answer:

1. Area of triangle SPQ=area of the triangle QRS true or false

7 0
2 years ago
What are the solutions of the equation 9x4 – 2x2 – 7 = 0? Use u substitution to solve. tions of the equation 9
skelet666 [1.2K]

Answer:

Step-by-step explanation:

Let u^2=x^4\\u = x^2

Subbing in:

9u^2-2u-7=0

a = 9, b = -2, c = -7

The product of a and c is the aboslute value of -63, so a*c = 63.  We need 2 factors of 63 that will add to give us -2.  The factors of 63 are {1, 63}, (3, 21}, {7, 9}.  It looks like the combination of -9 and +7 will work because -9 + 7 = -2.  Plug in accordingly:

9u^2-9u+7u-7=0

Group together in groups of 2:

(9u^2-9u)+(7u-7)=0

Now factor out what's common within each set of parenthesis:

9u(u-1)+7(u-1)=0

We know this combination "works" because the terms inside the parenthesis are identical.  We can now factor those out and what's left goes together in another set of parenthesis:

(u-1)(9u+7)=0

Remember that u=x^2

so we sub back in and continue to factor.  This was originally a fourth degree polynomial; that means we have 4 solutions.

(x^2-1)(9x^2+7)=0

The first two solutions are found withing the first set of parenthesis and the second two are found in other set of parenthesis.  Factoring (x^2-1) gives us that x = 1 and -1.  The other set is a bit more tricky.  If

9x^2+7=0 then

9x^2=-7 and

x^2=-\frac{7}{9}

You cannot take the square root of a negative number without allowing for the imaginary component, i, so we do that:

x=±\sqrt{-\frac{7}{9} }

which will simplify down to

x=±\frac{\sqrt{7} }{3}i

Those are the 4 solutions to the quartic equation.

5 0
3 years ago
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