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yawa3891 [41]
3 years ago
5

Find an equivalent expression to y + 4 + 3 (y + 2) please answer today

Mathematics
1 answer:
vekshin13 years ago
8 0
My answer would be 2y + 9
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For which interval does this quadratic inequality hold true? 6x − x2 − 8 > 0
xz_007 [3.2K]
6x-x^2-8 \ \textgreater \ 0 \\
-x^2+6x-8\ \textgreater \ 0 \\
-x^2+2x+4x-8\ \textgreater \ 0 \\
-x(x-2)+4(x-2)\ \textgreater \ 0 \\
(-x+4)(x-2)\ \textgreater \ 0 \\ \\
\hbox{the zeros:} \\
(-x+4)(x-2)=0 \\
-x+4=0 \ \lor \ x-2=0 \\
x=4 \ \lor \ x=2

The coefficient of x is negative, so the parabola opens downwards. The values greater than 0 are between the zeros.
The solution set for the inequality is:
x \in (2,4)

The answer is B.
8 0
3 years ago
Read 2 more answers
The midpoint of Line
enyata [817]

\bf ~~~~~~~~~~~~\textit{middle point of 2 points } \\\\ A(\stackrel{x_1}{1}~,~\stackrel{y_1}{-1})\qquad B(\stackrel{x_2}{x}~,~\stackrel{y_2}{y}) \qquad \left(\cfrac{ x_2 + x_1}{2}~~~ ,~~~ \cfrac{ y_2 + y_1}{2} \right) \\\\\\ \left( \cfrac{x+1}{2}~~,~~\cfrac{y-1}{2} \right)~~=~~\stackrel{M}{(3~~,~~1)}\implies \begin{cases} \cfrac{x+1}{2}=3\\[1em] x+1=6\\ \boxed{x=5}\\[-0.5em] \hrulefill\\ \cfrac{y-1}{2}=1\\[1em] y-1=2\\ \boxed{y=3} \end{cases}

4 0
3 years ago
-3/2(x-2) simplify please
mario62 [17]

Answer:-3x+6/2

Step-by-step explanation:

To simplify -3/2(x-2)

We get

-3x+6/2

4 0
3 years ago
Read 2 more answers
Which inequality represents the values of x that ensure triangle ABC exists? a triangle with side lengths of 6.5 units, 3.5 unit
nikdorinn [45]

Answer:

1 < x < 7.5

Step-by-step explanation:

This problem can be solved using given below property of triangle.

Sum of two sides is always greater than third side of triangle.

Difference of two sides is always lesser than third side of triangle.

_______________________________________________

Given

sides length

6.5 units

3.5 units

Third side is 2.5 +  x

using the property, Sum of two sides is always greater than third side of triangle.

6.5 + 3.5 > 2.5 +x

=>10 >2.5 + x

=>2.5 + x< 10

=> x< 10 -2.5

=> x < 7.5

using the property, Difference of two sides is always lesser than third side of triangle.

6.5 - 3.5 >  2.5 +x

=>3.5 >  2.5 +x

=> 2.5 +x  > 3.5

=> x  > 3.5 - 2.5

=> x  > 1

combining both we have

1 < x < 7.5

out of the given option none is 1 < x < 7.5

hence, correct answer will be 1 < x < 7.5 and wrong option can be claimed by student.

8 0
3 years ago
Read 2 more answers
Simplify the expression 21b4 − 3b by combining like terms.
mrs_skeptik [129]
I think the answer is number 3
4 0
3 years ago
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