All categories

3 years ago

Josie simplified an expression as shown below. In which step did Josie make mistake(s)?

Mathematics

1 answer:

Andreas93 [3]3 years ago

6 0

Answer:

D. Step 1 only.

Step-by-step explanation:

Here, Josie didn't use the distributive property correctly. The other two steps are still right, so D is correct.

How it should have been done:

x + 3 + 7x(x - 5)

Use the distributive property to multiply 7x by x - 5.

x + 3 + 7x² - 35x (The boldened part is what should have happened for Step 1)

Combine x and -35x to get -34x.

7x² - 34x - 3 is what the earlier equation should be simplified to.

You might be interested in

Complete the table for the given rule. Rule: y=X/4(fraction)

Lady_Fox [76]

Answer:

$\large\huge\boxed{\begin{array}{c|c}x&y\\\\4&1\\\\2&\frac{1}{2}\\\\9&\frac{9}{2}\end{array}}$

Step-by-step explanation:

$y=\dfrac{x}{4}$

Put the values of x from the table to the equation:

$x=4\to y=\dfrac{4}{4}=1\\\\x=2\to y=\dfrac{2}{4}=\dfrac{2:2}{4:2}=\dfrac{1}{2}\\\\x=9\to y=\dfrac{9}{4}$

From the comment.

Convert the equation:

$y=\dfrac{x}{4}$ multiply both sides by 4

$4y=x\to x=4y$

Put the values of y from the table to the equation:

$y=4\to x=(4)(4)=16\\\\y=2\to x=(4)(2)=8\\\\y=9\to x=(4)(9)=36$

$\large\huge\boxed{\begin{array}{c|c}x&y\\\\16&4\\\\8&2\\\\36&9\end{array}}$

3 0

3 years ago

What is the slope of the line represented by the equation 5x – 4y = 24?

taurus [48]

Answer:

Slope: 5/4

Step-by-step explanation:

As given the equation is 5x-4y =24

=5x-24 = 4y (switch over the y, turning the sign from negative to positive)

=5/4x -6 =y (divide everything by 4)

6 0

3 years ago

Negative sixteen plus the quiotient of a number and -4 and -3

Alinara [238K]

-15?
Maby
Sorry if this is wrong.... Just trying to help!

4 0

3 years ago

The measure of one angle of a triangle is 55 degrees. The measure of the third angle is 20 degrees more than twice the second an

sesenic [268]

If 1 angle is 55 and another is 55 add 20 (75) if you added them together it would be 130 so do 180 - 130 hope this helped!!

7 0

3 years ago

(6^3)^2 = A) 61 B) 65 C) 66 D) 69

Sunny_sXe [5.5K]

(6^3)^2 = 6^(3*2) = 6^6

Answer

c) 6^6

8 0

4 years ago