MATHEMATICS MIDDLE SCHOOL

Lucy found that a solution of x = − 4 was extraneous for her function. What would be a possible denominator in Lucy's function?x^2 +3x-4
x^2 -9
x+5
x-4

Answers

Answer 1
Answer: A solution is extraneous when the denominator of the function becomes zero when the solution is substituted.

Equating each of the options to 0:
x^2 +3x-4 = 0
x = 1 and -4

You can check the other options but they won't result to having a solution of x=-4

Therefore, the possible denominator of the function is x^2 +3x-4
Answer 2
Answer:

Answer:

Option 1

Step-by-step explanation:

We will find the solution for the expression in option 1

x^2+3x-4

x^2+4x-x+4

x^2-x+4x-4

x(x-1)+4(x-1)

(x+4)(x-1)

Hence, x=1 and x=-4 willl be the solution

Hence, x^2+3x-4  will be in denominator.

Hence, Option 1 is correct

Option 2,3 and 4 are discarded.

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Order the following from greatest to least: -12,12,-19,1 and 1/2,5.....

Answers

-19, -12, 1/2, 1, 5, 12 ----> least to greatest
12, 5, 1, 1/2, -12, -19 ----> greatest to least

Do the same as the last one, starting with the largest negative number, and ending with the largest positive number.  The only difference in this case is that it is greatest to least.  I tend to go from least to greatest first and then flip it around to get greatest to least (:

What is 4/9 in to a percent

Answers

To solve, simply plug the fraction into your calculator

4/9=.44444444444 (repeating) or 44.44%

Answer= 44.44%
4 / 9 = 0.44444444..........
4/9 = 44.44444444444444...%

Suppose Y varies directly as X, and y = 9 when x = 3/2. Find y when x = 1.

Answers

Answer:  The required value of y is 6.

Step-by-step explanation: We are given that y varies directly as x and y = 9 when x=(3)/(2).

We are to find the value of y when x = 1.

According to the given information, we have

y\propto x\n\n\Rightarrow y=k* x~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[\textup{where k is the constant of integration}]\n\n\Rightarrow y=kx~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)

When y = 9 and x=(3)/(2), we have from equation (i) that

9=k*(3)/(2)\n\n\n\Rightarrow k=(18)/(3)\n\n\Rightarrow k=6.

So, equation (i) becomes

y=6x.

Therefore, when x = 1, we get

y=6*1=6.

Thus, the required value of y is 6.
to vary directly is to be in proportion

y/x = y/x

9/(3/2) = y
9(2/3) = y
y = 6

What is 8.45 to the nearest tenth

Answers

Look at the tenth digit, which is 4. now look at the digit to the right on the tenth digit that's 5. so the rule is if the digit to the right of the place ur rounding to is 4 or less, u round down, if it's 5 or up, round up.
so in this case since there's a 5 u round up.
8.5 is the answer.
8.45 rounded to the nearest tenth is:

8.6 because 5 is equal to 5

Hope I Helped You!!! :-)

Have A Good Day!!!

Please answer this one for me

Answers

A.) Your second point will be (25,125) because your y-intercept is 50 you move up 3 gridlines and to the right one and that will be your second point.

Divide 33 photos into two groups so the ratio is 4 to 7, please help!!!!

Answers

The ratio 4 to 7 means that for every 4 photos in one group, there are 7 in the other group. So to divide the 33 photos into two groups with the ration 4 to 7 we can make a chart where we would have group one on one side and group two on the other. On one side we would increase by 4 each time and on the other side you would increase by 7 each time. Keep going until you find a row in where the numbers add to 33. So:

Group 1 / Group 2
4 7
8 14
12 21

Here we can see that 12 + 21 = 33 So in one group we will have 12 photos and the other group we will have 21 photos
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