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Olegator [25]
2 years ago
14

A triangle has base 6 cm and area 42 cm^2 what is the height of the triangle

Mathematics
1 answer:
Svetllana [295]2 years ago
6 0
To find the area of a triangle, the formula is
A=bh/2
42=6h/2
Divide both sides by 6 giving you
h/2=7
Then, multiply by 2 on both sides giving you
h=14
The height then is 14 cm.
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It always confuses me when they make me do the baby steps
fgiga [73]

A. Alright, we want to multiply one equation by a constant to make it cancel out with the second. Since the first equation has a "blank" y, let's multiply the first equation by <em>2</em>.

3x-y=0 → 2(3x-y=0) = 6x - 2y = 0

5x+2y=22


The answer for this part would be: 6x - 2y = 0 and 5x + 2y = 22


B. So now we combine them:

6x - 2y = 0

+ + +

5x + 2y = 22

= = =

11x + 0 = 22 ← The answer


C. Now that we have the equation 11x = 22, we solve for x

11x = 22 ← Divide both sides by 11

x = 2 ← The answer


D. Now that we have x=2, we plug that back in to 5x+2y=22 and solve for y:

5(2)+2y = 22

10 + 2y = 22

2y = 12

y = 6


<u>Therefore, the solution to this problem is x = 2 and y = 6</u>


5 0
3 years ago
The sales tax on the model rocket shown is $1.92. What is the percent of sales tax? A drawing of a model rocket with a tag label
astraxan [27]

<u><em>Answer:</em></u>

The sales tax is 8%

<u><em>Explanation:</em></u>

<u>We are given that:</u>

The price of the rocket is $24 and the sales tax is $1.92

To get the percentage of the sales tax, all we have to do is divide the sales tax by the price of the rocket and then multiply the quotient by 100 (to convert the ratio to percentage)

<u>This is done as follows:</u>

% of sales tax = \frac{tax}{price}*100

% of sales tax = \frac{1.92}{24}*100 = 8%

Hope this helps :)

4 0
3 years ago
a fan has five equally spaced blades. suppose you line up two fans directly on top of each other. What is the least number of de
Irina18 [472]

Answer:

72°

Step-by-step explanation:

There are 5 blades, equally spaced.  So the angle between adjacent blades is 360° / 5 = 72°.  So you can rotate the fan 72° and the blades will align again.

7 0
3 years ago
Mrs. Frasier is making costumes for the school play. Each costume requires 3/4 yards of fabric. She bought 6 yards of fabric. Ho
kodGreya [7K]

Answer:

8 costumes

Step-by-step explanation:

Take the total amount of fabric and divide by the amount per costume

6 ÷ 3/4

Copy dot flip

6 * 4/3

6/3 *4

2 *4

8

She can make 8 costumes

6 0
3 years ago
10 points and Brainly to who gets it right first
8_murik_8 [283]

Answer:

A.9

F.27

Step-by-step explanation:

how i got 9 is by counting by 9 and i count 27,and 54

additional 27 times 2= 54

5 0
3 years ago
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