3 1 5 × 1 1 8 Give your answer as a mixed number in its simplest form.

Mathematics

1 answer:

Inga [223]3 years ago

4 0

Answer:

is it saying 3 1/5 * 1 1/8?

Step-by-step explanation:

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I need help with this

sleet_krkn [62]

First lets invert the divisor and chane to a multuplication:-
x + 5 2x^2 - 7x - 4
----------------- * --------------------
2x^2 + 3x + 1 3x^2 + 18x + 15

Now we can factor the 3 trinomials:-
x + 5 (2x + 1)(x - 4)
-------------- * ------------------
(2x + 1)(x + 1) 3(x + 5)(x + 1)

Now we simplify because (2x + 1) and (x + 5) are common to top and bottom:-
1 * x - 4
= ------------- ------------
x + 1 3( x + 1)

= x - 4
--------------
3(x + 1^2

5 0

3 years ago

Thrice of product of five and b is reduced by 2

Diano4ka-milaya [45]

3 times the product of 5 and b is reduced by 2
3*(5*b)-2
15b-2

5 0

4 years ago

Solve the equation 3x+x²=-7. Does the number of solutions match the information provided by the discriminant? Explain

MA_775_DIABLO [31]

Answer:

$-\frac{3}{2}+\frac{\sqrt{19}i}{2}$ and $-\frac{3}{2}-\frac{\sqrt{19}i}{2}$

Step-by-step explanation:

$3x+x^2=-7\\\Rightarrow x^2+3x+7=0$

Discriminant

$D=b^2-4ac\\\Rightarrow D=3^2-4\times 7\times 1\\\Rightarrow D=-19$

If the discriminant is a negative number then the roots of the equation are imaginary

$x=\frac{-b\pm \sqrtD}{2a}\\\Rightarrow x=\frac{-3\pm \sqrt{-19}}{2\times 1}\\\Rightarrow x=-\frac{3}{2}\pm \frac{\sqrt{19}i}{2}\\\Rightarrow x=-\frac{3}{2}+\frac{\sqrt{19}i}{2}, x=-\frac{3}{2}-\frac{\sqrt{19}i}{2}$