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kompoz [17]
3 years ago
13

I need help! It's all in the picture, please show work and no violating rules of Brainly!

Mathematics
1 answer:
OlgaM077 [116]3 years ago
5 0

Answer:

860cm²

Step-by-step explanation:

1. area of the side triangle:

(15×8)×2= 120×2= 240cm²

there's two side triangles with the same length and width, so just multiply by two.

2. area of the square on top:

20×8= 160cm²

3. area of the rectangle behind:

20×8= 160cm²

4. area of the square below:

20×15= 300cm²

5. the total of all areas (surface area):

240+160+160+300= 860cm²

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In the past, 25% of the town residents participated in the school board elections. The town officials recently undertook an exte
Wewaii [24]

Answer:

1.H_{0}:at most 25% of the town residents participate in the school board election

H_{a}:more than 25% of the town residents participate in the school board election

2.p_{0} = 0.25

Step-by-step explanation:

p_{0} is choosen as the highest possible proportion probability according to the null hypothesis, which is 25%

7 0
3 years ago
What are all the multiplication combinations for 18
stepan [7]
Here are the combinations:

1x18 = 18
18x1 = 18
9x2 = 18
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7 0
3 years ago
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The ratio of boys to girls in a class is 4 : 5
Fofino [41]

Answer: 4/9 of the class are boys and 5/9 of the class are girls.

Step-by-step explanation:

  1. There are 9 nine students in total in the class since 4 + 5 = 9.
  2. Input the amount of boys and girls there are in the class in the numerator  and have 9 as the denominator. 4/9 of the class are boys and 5/9 of the class are girls.
7 0
3 years ago
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Find a number whose product with 7 is the same as its sum with 18
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7 + 18 = 25
25 ÷ 7 = 3.5714285714285714285

so 3.5714285714285714285 is the answer
7 0
3 years ago
Four more than three times n equals -5
Verizon [17]
3n+4=-5

do the opposite of adding 4. this means you have to subtract 4 from 4. whatever you do to the problem, you must do to the answer. now subtract 4 from -5.

-5-4=-9

since 4-4=0, we can take 4 out of the equation. now you have:

3n=-9

now divide -9 by 3

-9/3=-3

n=-3

hope this helps :)
5 0
3 years ago
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