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2 years ago

15

To find the area of a triangle, you can use the expression b times h divided by 2, where b is the base of the triangle and h is

it’s height. What is the area of a triangle with a base of 8 and a height of 4?

1 answer:

vladimir1956 [14]2 years ago

4 0

Answer:

16 sq. units

Step-by-step explanation:

<u>The formula for the area of a triangle:</u>

A = 1/2bh

<u>If base and height are known as:</u>

b = 8 units and h = 4 units

<u>Then the area is:</u>

A = 1/2*8*4 = 16 sq. units

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Answer:

B: Y=1/2×+2 I think that's it

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2 years ago

The function f is defined by the following rule.

Leno4ka [110]

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2 years ago

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2 years ago

Charlie's garage has a rectangular floor space. Its length is 3 times its width. Charlie extends the width of his garage to 6 m,

MAXImum [283]

Answer:

The percentage change is 140%

Step-by-step explanation:

Given

$L= 3W_1$ ---- initial dimension

$W_2 = 6m$ --- new width

$A_2 = 45m^2$ --- new dimension

Required

The percentage increment

The length remains constant because only the width is extended.

The new area is:

$Area =Length * Width$

$A_2=L * W_2$

Make L the subject

$L = \frac{A_2}{ W_2}$

Substitute values for A and W

$L = \frac{45m^2}{6m}$

$L = \frac{45m}{6}$

$L = 7.5m$ --- this is the length of the garden

Calculate the initial width:

$L= 3W_1$

Make W1 the subject

$W_1 = \frac{1}{3} * L$

$W_1 = \frac{1}{3} * 7.5$

$W_1 = 2.5$

So, the initial area is:

$A_1 = L_1 * W_1$

$A_1 = 2.5 * 7.5$

$A_1 = 18.75$

The percentage change in area is:

$\%A = \frac{A_2 - A_1}{A_1}$

$\%A = \frac{45 - 18.75}{18.75}$

$\%A = \frac{26.25}{18.75}$

$\%A = 1.4$

Express as percentage

$\%A = 1.4*100\%$

$\%A = 140\%$

4 0

2 years ago

Trini took some photos the number of photos she took is a two-digit number the sum of the digits is 11 the tens digit is 3 more

horsena [70]

Trini took 74 photos

<em><u>Solution:</u></em>

Given that Trini took some photos

The number of photos she took is a two-digit number

Let the number in unit place be x and the number in tens place be y

Then the two digit number is yx

Given that sum of digits is 11

Therefore,

x + y = 11 ---- eqn 1

The tens digit is 3 more than the ones digit

Therefore, we frame a equation as,

y = 3 + x ---- eqn 2

<em><u>Solve eqn 1 and eqn 2 to get value of "x" and "y"</u></em>

Substitute eqn 2 in eqn 1

x + 3 + x = 11

2x + 3 = 11

2x = 11 - 3

2x = 8

x = 4

Substitute x = 4 in eqn 2

y = 3 + 4 = 7

Thus the two digit number is 74. Thus he took 74 photos

5 0

3 years ago