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3 years ago

8

Two diagonals divide a square into 4 congruent triangles. The base of each triangle is 8 inches and the height is 5 inches. What

is the area of the square?

1 answer:

trasher [3.6K]3 years ago

4 0

80

Step-by-step explanation:

1. Find an area of 1 triangle:

5x8x1/2=20

2. Multiple by 4

20x4=80

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Sedbober [7]

Answer:

Brett is 62 years old, Carl is 70 years old and Mark is 80 years old.

Step-by-step explanation:

let the age of Brett be <em>x</em> years.

thus the age of Mark is <em>(x+18)</em> years .

{as it is given that Brett is 18 years younger than Mark}

∴ Age of Carl is <em>(x+8) </em>years .

Now the sum of ages,

3x+26=212 (given)

3x=186

∴x=62

thus , the age of Brett is 62 years , the age of mark is <em>(x+18)</em>= 80 years and the age of Carl is <em>(x+8)</em>= 70 years

3 0

3 years ago

3 out of every 5 students in Mrs. Wilson's class have brown eyes. There are 20 students in Mrs. Wilson's class. How many of the

Alex787 [66]

Answer:

12

Step-by-step explanation:

So there is 3:5 right, so 20 divided by 5 equals 4, there are four 5's in 20. Then 4 multiplied by 3 equals 12. So there are 12 students that has BROWN EYES.

<em>Hope I Helped You :)</em>

7 0

2 years ago

What is vaule of y when x=4'5

Degger [83]

Answer:

$y = 2.096$ or $y = \frac{2\sqrt5+6}{5}}$

Step-by-step explanation:

Given

$y = \frac{4}{x} + \sqrt x + 0.2 - 5x$

$x = \frac{4}{5}$

Required

Find y

$y = \frac{4}{x} + \sqrt x + 0.2 - 5x$

Substitute $x = \frac{4}{5}$

$y = \frac{4}{4/5} + \sqrt{4/5} + 0.2 - 5 * 4/5$

$y = 5 + \sqrt{4/5} + 0.2 - 4$

Collect like terms

$y = \sqrt{4/5} + 5 + 0.2 - 4$

$y = \sqrt{\frac{4}{5}} + 1.2$

Split the surd

$y = \frac{\sqrt4}{\sqrt5}} + 1.2$

$y = \frac{2}{\sqrt5}} + 1.2$

Rationalize

$y = \frac{2\sqrt5}{\sqrt5*\sqrt5}} + 1.2$

$y = \frac{2\sqrt5}{5}} + 1.2$

Take LCM and add

$y = \frac{2\sqrt5+1.2*5}{5}}$

$y = \frac{2\sqrt5+6}{5}}$

or solve as:

$y = \frac{2*2.24+6}{5}}$

$y = \frac{10.48}{5}$

$y = 2.096$

7 0

3 years ago

Elaine is making a flower garden with rows of flowers. The garden is 2020 yards long. She wants a total of 77 rows of flowers th

aleksandrvk [35]

Wouldn't she divide 2020 and 77?

3 0

3 years ago

Read 2 more answers

Complete the pattern 5, 10, 30, 60, 180

Evgen [1.6K]

540 is the answer because the doubled the first number to get the second number and multiplyed that by 3 to get the third number

8 0

3 years ago

Read 2 more answers