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4 years ago

I NEED MAJOR HELP ON THIS PLEASE

Mathematics

1 answer:

Airida [17]4 years ago

3 0

The error is in step 3.

When you have 8x = 10 in order to get x by itself, you need to divide both sides by 8

so it should be x = 10/8

The answer is B.

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HELP NOW PLEASEEEEE !!! Factor using the GCF: 45n² + 9

Irina-Kira [14]

Answer:

9(5n²+1)

step by step explanations;

5 0

3 years ago

a hardcover book sells for $24 at the Bookmart. Ben pays a total of $25.02 for the book. What is the sales tax rate?

lana [24]

25.02-24=1.02
1.02/24=.0425
So the sales tax rate is 4.25%

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3 years ago

Determine whether the points lie on straight line.

wel

Answer:

A) Non-collinear- does not lies on straight line

B) Collinear- lie on straight line

Step-by-step explanation:

We have to check collinearity of three points.

The points $(x_1, y_1, z_1),(x_2, y_2, z_2),(x_3, y_3, z_3)$ are said to be collinear if,

$\left[\begin{array}{ccc}x_1&y_1&z_1\\x_2&y_2&z_2\\x_3&y_3&z_3\end{array}\right] = 0$

A) A(2, 5, 3), B(3, 7, 1), C(1, 4, 4)

$\left[\begin{array}{ccc}2&5&3\\3&7&1\\1&4&4\end{array}\right] \\\\=2(28-4)-5(12-1)+3(12-7)\\= 8 \neq 0$

Thus, the given points are not collinear.

B) D(0,-5,5), E(1,-2,4), F(3,4,2)

$\left[\begin{array}{ccc}0&-5&5\\1&-2&4\\3&4&2\end{array}\right] \\\\=0(-4-16)+5(2-12)+5(4+6)\\=0$

Thus, the given points are collinear.

6 0

3 years ago

Find the value of 42 - (-10)<br>*explain how to solve*

Nuetrik [128]

Answer: 52

Step-by-step explanation:

42-(-10) first since your multiplying the two negative signs with each other it turns into a positive and looks like 42+10 and 42+10=52

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3 years ago

Select the table that represents the ratio of white boxes to black boxes.

sweet [91]

Answer:

Step-by-step explanation:

Ratio should be 4:5

12:15 is 4:5

20:25 is 4:5

28:35 is 4:5

36:46 is 4:5

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3 years ago