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3 years ago

Help me with the triangle area please

Mathematics

2 answers:

dexar [7]3 years ago

7 0

Answer:

15 m ^2

Step-by-step explanation:

3 x 10 is 30

divide that by 2 since the triangle can fit in half of the rectangle shape

you will get 15

Sindrei [870]3 years ago

5 0

Answer:

Step-by-step explanation:

<h2><u>Area of a triangle</u></h2><h3>formula of area: </h3>

1/2 * b*h

b is the base

h is the height

= 1/2 * 10 * 3

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A pyramid has a square base and a height of 6 ft. The volume of the pyramid is 162 ft^3. Let s be the length of a side of the py

geniusboy [140]

Answer:

$(a)s^2\\(b)162=2s^2\\(c)s=9$ ft$

Step-by-step explanation:

(a)Base Area

Side length of square base=s

Area of a Square of side length s= $s^2$ ft^2$

(b)

Height =6 ft
Volume= $162 $ ft^3.$

Volume of a Pyramid $=\frac{1}{3}X$Base Area X Height$

Substituting the given values, we have:

$162=\frac{1}{3}Xs^2 X 6\\\\162=2s^2$

(c)Solving the equation derived from (b)

$162=2s^2\\$Divide both sides by 2\\s^2=81\\s^2=9^2\\s=9$ ft$

Solving this equation shows that s =9 ft.

4 0

3 years ago

Rewrite the expression -2a(a+b-5)+3(-5a+2b)+b(6a+b-8)

erastovalidia [21]

First, think of it as 3 different expressions.Go through them one at a time. There is:
-2a(a+b-5) ] +3(-5a+2b) ] +b(6a+b-8)
Multiply everything out.] Multiply everything out. ]Multiply everything out
-2a x a = -2a² ] +3 x -5a = -15a ] +b x 6a = 6ab
-2a x b = -2ab ] +3 x 2b = 6b ] +b x b = b²
-2a x -5 = 10a ] -15a + 2b = -15a+2b ] +b x -8 = -8b -2a² + -2ab + 10a = ] ] 6ab + b² + -8b =
-2a²+-2ab+10a ] ] <span>6ab+b²+-8b
</span>Now add everything up, but before that, remember these algebraic rules:
∞A.S.S. Add Same Signs, meaning positive add positive or negative add negative equals a positive number or 0. E.g 1+1=1 and -1+-2= 1
∞S.I.D. Subtract If Different, meaning a positive number add a negative number always equals a negative number or 0. E.g 1 + -2 = -1
∞You can only add up "similar terms", meaning you can add 'terms' ending in 'a' for example with another 'term' ending in 'a'. However. you cannot add a term ending in 'a' to an 'ab' or an 'a²'.
Following these rules, -2a²+-2ab+10a+-15a+2b+<span>6ab+b²+-8b =
</span>4ab-5a-6b+b²-2a²

Hope that helps you and that it wasn't too tricky to understand. :)

3 0

3 years ago

John has walked 15% of the way

pogonyaev

30 mm he walls from home to school

6 0

3 years ago

I'm pretty sure that this is the answer

valentina_108 [34]

Step-by-step explanation:

your correct I'm pretty sure

6 0