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Fittoniya [83]
3 years ago
5

Plz help me with a and b who can answer in a minute

Mathematics
2 answers:
Tcecarenko [31]3 years ago
7 0
A) 1/4
B) 1/16
This is the right answer! Hope it helps :)
Irina18 [472]3 years ago
5 0
(a) \frac{1}{4}
(b) The Road Tennis Court occupies \frac{1}{3} of the shaded portion.

I hope it helps! ;)
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What is 75% of 162? Show your work and/or explain your reasoning.
zhannawk [14.2K]

Answer:

121.5

Step-by-step explanation:

75% =  75/100

Step 2 - Mutiply percenatge fraction by the entire (100%) quantity

75/100× 162 = 121.5

Final result

75 percent of 162 is 121.5

3 0
2 years ago
Read 2 more answers
At the fair the 'Twirly Tea Cups'ride can hold nine people per tea cup.If the ride has seven tea cups,how many total people can
Kamila [148]

63 people should be able to fit in because 7 times 9 is 63.

If I'm wrong, contact me.

6 0
3 years ago
Read 2 more answers
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
A random sample of 10 single mothers was drawn from a Obstetrics Clinic. Their ages are as follows: 22 17 27 20 23 19 24 18 19 2
mel-nik [20]

Answer:

0.09

Step-by-step explanation:

Let x = ages of mother

x  :  22   17    27    20    23     19      24    18    19    24

N = 10

Mean = ∑x/N = 218/10 = 21.8

Difference in mean = 21.8 - 20 = 1.8

If significance level = 5% or 0.05

∴ Rejection region = 1.8 X 0.05 = 0.09

8 0
3 years ago
TRIGNONMETRY
pishuonlain [190]

Answer:

i like ur pp

Step-by-step explanation:

6 0
2 years ago
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