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4 years ago

What is the answer??

Mathematics

2 answers:

zaharov [31]4 years ago

6 0

B in step 3 17 wasn't distributed correctly

qwelly [4]4 years ago

5 0

The answer is b). They did not distribute the 17 to the 2
hope this helps!

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Which of these tables represents a linear function?

IrinaK [193]

Answer:

The second table because they are almost the same thing

Step-by-step explanation:

4 0

3 years ago

ABCD is a trapezium with AB= x cm, DC=( x+ 4 )cm and the distance between the parallel sides AB and DC is 1/2 x cm

horsena [70]

We know that the smaller base is x cm, the greater base is x+4 cm, and that the height is x/2 cm.

Since the area of a trapezium is given by

$A=\dfrac{(b+B)h}{2}$

If we plug the expressions we have

$A=\dfrac{(x+(x+4))\frac{x}{2}}{2}=\dfrac{(2x+4)x}{4}=\dfrac{2x^2+4x}{4}$

If this must equal 84, we can solve for x as follows: start with

$\dfrac{2x^2+4x}{4}=84$

Multiply both sides by 4:

$2x^2+4x=336$

Subtract 336 from both sides:

$2x^2+4x-336=0$

We can divide both sides by 2 to make computation simpler:

$x^2+2x-168=0$

Use the quadratic formula (or any mean you prefer) to solve this equation and get the solutions

$x_1=-14,\quad x_2=12$

We can't accept the negative solution, because it would imply

$AB=-14,\quad CD=-10$

and we can't have negative side lengths. So, the answer is 12.

4 0

3 years ago

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -1/2f(x)?

Alja [10]

Answer:

The line will change its slope by a factor of -2 (line will now "point down" with twice the original steepness)

Step-by-step explanation:

f(x) = x | replace f(x) --> (-1/2)f(x)

(-1/2)f(x) = x

f(x) = -2x

4 0

4 years ago

Please help ASAP!!!

Ne4ueva [31]

Answer:

Step-by-step explanation:

Find the sum of the squares of the residuals for

y  2x  6

6 0

3 years ago

Is Q the midpoint or PR? please justify the answer

mezya [45]

Since PQ=PR
=> Q is the midpoint of PR
Hope this helps you

6 0

4 years ago