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3 years ago

9x+12x-21=27 How do I solve ?

Mathematics

1 answer:

alexandr402 [8]3 years ago

6 0

You gotta combine like terms which would be 9x and 12x which gives you 21x .

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Mr. lang has two sons the sum of their ages 19. the product of their ages is 84. how old is Mr. lang youngest son

kolbaska11 [484]

Answer: The age of Mr. Lang's youngest son is 7 years old.

Step-by-step explanation:

Let's start by listing the factors of 84. The factors of 84 are 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42 and 84.

We can only use numbers that are under 19 since we must add up to that total. Now we are left with 1, 2, 3, 4, 6, 7, 12, and 14,

1 can't be an option since 18 is not there to pair with it to add together for 19. For the same reason we can eliminate 2, 3, 4, 6, and 14.

Now we are left with 7 and 12. Let's see is they will work.

7+12=19

7×12=84

It works! Since 7 is the smaller number that's the age of Mr. Lang's youngest son.

3 0

3 years ago

O (1.4)<br> O (0.6)<br> O (2, 3)<br> O (5,0)

Illusion [34]

Answer:

(0.6)

Step-by-step explanation:

the y intercept is determined by wherever x = 0

the ordered pair (0,6) has the x value equaling 0

therefore (0,6) represents the y-intercept

4 0

3 years ago

Read 2 more answers

What is an equation of the line that passes through the point (4,-3) and is perpendicular to the line 4x+y=3

madam [21]

Answer:

y = -0.25*x + 2

Step-by-step explanation:

y = a*x + b

is perpendicular to the line 4x+y=3 -> a = -1/4 = -0.25

y = -0.25*x + b

b = y + 0.25*x = -3 + 0.25*4 = -2

y = -0.25*x + 2

5 0

3 years ago

PLZ SOMEONE HELP I NEED IT DONE

Serga [27]

1. 114 2. 244 3. 90 4. 226 5. 228 6. 454

4 0

3 years ago

The net of a rectangular prism is shown below. What is the total surface area of the rectangular prism represented by this net?

Finger [1]

Answer:

150.88 cm²

Step-by-step explanation:

A rectangular prism also known as cuboid is a three dimensional object with six rectangular faces and eight vertices. It is a prism because it has the same cross section along the length. It is called a rectangular prism because its cross section is rectangular.

The opposite faces of a rectangular prism are equal to each other.

The total surface area (TSA) of a rectangular prism is:

TSA = 2(wl + wh + lh)

where w is the width of the base, l is the length of the base and h is the height of the prism.

From the question, we can see that:

w = 5 cm, l = 7.4 cm and h = 3.1 cm. therefore:

TSA = 2(wl + wh + lh) = 2[(5 * 7.4) + (5 * 3.1) + (7.4 * 3.1)] = 2(37 + 15.5 + 22.94)

TSA = 2(75.44)

TSA = 150.88 cm²

3 0

3 years ago