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3 years ago

Calculate the area of the triangle below.

Mathematics

2 answers:

Setler79 [48]3 years ago

7 0

Answer:

52.5 ft^2

Step-by-step explanation:

7ft * 12ft = 84

84 / 2 = 42

7ft * 3ft = 21

21 = 2 = 10.5

42 + 10.5 = 52.5

To solve for a right sided triangle simply multiply the sides as if you were solving a square and then divide it by two. If you split these into two right sided triangles you can just solve each one and then add them

nikklg [1K]3 years ago

3 0

Answer:

D- 52.5

Step-by-step explanation:

12ft + 3ft = 15ft

base= 15ft

height=7ft

area = 0.5 * b * h

area = 0.5 * 15 * 7

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2(a³+b²+11)+1(3+a³+b+11)

Ann [662]

Answer:

$2(a^3+b^2+11)+1(3+a^3+b+11)=3a^3+2b^2+b+36$

Step-by-step explanation:

I assume that you need simplification of the given expression.

The given expression is:

$2(a^3+b^2+11)+1(3+a^3+b+11)$

Using distributive property and multiplying 2 inside the parenthesis and 1 inside the other parenthesis. This gives,

$2(a^3+b^2+11)=2\times a^3+2\times b^2+2\times 11\\2(a^3+b^2+11)=2a^3+2b^2+22\\\\1(3+a^3+b+11)=1\times 3+1\times a^3+1\times b+1\times 11\\1(3+a^3+b+11)=3+a^3+b+11=a^3+b+14$

Therefore, $2(a^3+b^2+11)+1(3+a^3+b+11)$ is equal to:

$2a^3+2b^2+22+a^3+b+14$

Now, combining like terms using the commutative property of addition, we get:

$=(2a^3+a^3)+2b^2+b+(22+14)\\=3a^3+2b^2+b+36$

Therefore, the simplified form is $3a^3+2b^2+b+36$

8 0

4 years ago

Questions:

iren2701 [21]

Ava's mother is 36, A+3A+2(3A)=120. 12+36+72=120. A=12. The smallest number is 12.5, X+(X+4)+2x=54. 12.5+16.5+25=54 :)

6 0

4 years ago

How can i solve this? I've looked at countless videos and nothing helps.

Andrej [43]

Let $x$ be the number of lower-level tickets sold, and $y$ the number of upper-level tickets sold.

Now, if the theater sells 350 tickets total, that means the number of lower-level and upper-level tickets that got sold should add up to 350, so one equation in the system is

$x+y=350$

You also know that the theater earns $10250 in sales, so if each lower-level ticket costs $35, and each upper-level ticket costs $25[/tex], this means $35x$ represents the amount of money made from selling lower-level ticekts, and $25y$ represents the amount of money made from selling upper-level tickets. You get the second equation in the system,

$35x+25y=10250$

So the system is

$\begin{cases}x+y=350\\35x+25y=10250\end{cases}$

Any one of the methods listed in the second part works in solving this system (though I'm not sure what "variable" refers to), but I think substituting involves the least work.

Solve the first equation for either variable; I'll choose $x$ .

$x+y=350\implies x=350-y$

Now substitute this into the second equation for $x$ , then solve for $y$ .

$35(350-y)+25y=10250\implies 10y=2000\implies y=200$

So 200 upper-level seats were sold. Meanwhile, since $x+y=350$ , this means

$x+200=350\implies x=150$

so that 150 lower-level tickets were sold.

6 0

3 years ago

the ratio of red marbles to blue marbles was 8 to 3. What was the ratio of blue marbles to red marbles

Ivanshal [37]

Answer:

3:8

Step-by-step explanation:

If the ratio of red marbles to blue marbles is 8:3, and the question is asking for the ratio of blue marbles to red marbles, all you have to do is switch the numbers around.

The ratio of blue marbles to red marbles is 3:8

Hope this helps!

5 0

3 years ago

Evaluate the expression.<br><br> -66/(-3) + (-4) - (-5)

Rasek [7]

Answer:

Step-by-step explanation:

Simplify the following:

(-66)/(-3) - 4 - -5

The gcd of -66 and -3 is -3, so (-66)/(-3) = (-3×22)/(-3×1) = (-3)/(-3)×22 = 22:

22 - 4 - -5

-(-5) = 5:

22 - 4 + 5

22 + 5 = 27:

27 - 4

| 2 | 7

- | | 4

| 2 | 3:

Answer: 23

7 0

3 years ago

Read 2 more answers