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atroni [7]
4 years ago
15

Help pleaseeee . i’m not good

Mathematics
1 answer:
Lemur [1.5K]4 years ago
4 0

The picture above should help

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Find the height and area of each of these triangles ​
andreev551 [17]

Answer:

area= 1/2*(h*b) h- height, b- base

the triangle is isosceles (denoted by the 2 dashes on the sides of the triangle)

so they are equal in length

angles in triangle = 180

so 38+38=76

180-76=104

base=24

divide the triangle in the center

so now triangle 1(left) the base = 12

and triangle 2(right) the base = 12

use trigonometric ratios

in this we need to find the height

which is opposite of 38,

we already have the adjacent =12

so the ratio is Tan (Tangent Opposite/Adjacent)(TOA)

Tan38= (12/h)

multiply by h

h*Tan38=12

h=12/tan38 = 15.35929959

8 0
3 years ago
Please help!!
ratelena [41]
OK so 80% of 8,200=6560

8,200-6560= 1,640

He lost 1,640
6 0
4 years ago
Read 2 more answers
Picking a card and spinning a spinner are independent events.<br><br> True<br> False
nekit [7.7K]

Answer:

True

Step-by-step explanation:

Both happened in different times and are seprate events

7 0
3 years ago
I am not sure how sigma notation works, can somebody explain how to solve this? It isn't the second choice.
Masja [62]

Answer:

first answer is correct

Step-by-step explanation:

Hello, we want to write 2 + 4 + 6 + ... + 20

for n = 1, 2n = 2*1 =2

for n = 2, 2n = 2*2=4

for n = 3, 2n=2*3=6

etc

so

\displaystyle \sum_{n=1}^{10} {2n} = 2*1 + 2*2 +2*3+2*4+...+2*10=2+4+6+8+...+20

thanks

6 0
3 years ago
Joel made muffins, he gave 1/4 to his neighbor and 3/8 to his school how may muffins were left
jolli1 [7]
When you're adding fractions with two different denominators, the best thing to do is to find a common denominator;
In this case, 4 and 8 are both multiples of 8, and therefore, you've got to double the first fraction.
Doubling the first fraction gives you 2/8 and 3/8. You've then got to add these together, and this gives you 5/8 (as you only add the numerators)
As you're looking for what is left, you have to do 8/8- 5/8 (once again, only subtracting the numerators)
8/8- 5/8= 3/8
Therefore, 3/8 of the muffins are left.
Hope this helps :) 
7 0
4 years ago
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