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andrew11 [14]
3 years ago
8

SORRY PLEASE DONT BAN ME BRAINLY!!!!!!

Mathematics
2 answers:
Elenna [48]3 years ago
6 0

Answer:

(Brainly) BE BANNEDDDDDDDDDD

Step-by-step explanation:

Gre4nikov [31]3 years ago
5 0

Answer:.

Step-by-step explanation:

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K divided by 11 is 7.<br>​
sp2606 [1]

Answer:

ok

Step-by-step explanation:

3 0
3 years ago
Mrs. Alvarez asked her class how many hours of TV they watched per day (to the nearest half hour) The results were shown: 0 - 1
n200080 [17]

Answer: 7/12

Step-by-step explanation:

5 0
3 years ago
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the area of a triangle is 96 2. the height of the triangle is 8 inches. find the perimeter of the triangle if each side of the t
Anastasy [175]
Area = 1/2 bh
96 = 1/2 x b x 8 = 4b
b = 96/4 = 24 inches

Perimeter = 3b    [since the other sides are equal to the base]

P = 3 x 24 = 72 inches.
4 0
3 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.

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3 years ago
Are the triangles congruent?? Justify the answer
dimulka [17.4K]
Yes because they are at acute angels
6 0
2 years ago
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