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Katyanochek1 [597]
3 years ago
6

a helicopter is 14 meters above a canyon it goes down 20 meters then up 5 write a subtraction sentence, how do you know your ans

wer is correct?​
Mathematics
1 answer:
MArishka [77]3 years ago
3 0

Answer:

14 - 20 + 5

14 - 15 = -1

-1

If you take 14 meters and you go down 20 meters that is 14 - 20

Then, if you go up 5 meters, that is 14 - 20 + 5.

So simplify 14 - 20 + 5.

Simplified: 14 - 15

So the answer is -1 meter

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Robert is putting new roofing shingles on his house. Each shingle is 1 2/3 feet long. The north part of the house has a roof lin
Mariana [72]

Answer: 36 shingles can be placed on the north part of the house.

Step-by-step explanation:

Given: Length of each shingle = 1\dfrac23 feet = \dfrac53 feet.

The north part of the house has a roof line that is 60 feet across.

Then, the number of  shingles can be placed  on the north part of the house = (Length of roof line in north part) ÷ (Length of each shingle)

=60\div \dfrac{5}{3}\\\\=60\times\dfrac{3}{5}\\\\=12\times3=36

Hence, 36 shingles can be placed on the north part of the house.

3 0
3 years ago
What is 3z+2+(-5z)+6
BartSMP [9]

Answer:

-2z+8

Step-by-step explanation:

3z+2+(-5z)+6

3z+2-5z+6

-2z+2+6

-2z+8

7 0
4 years ago
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THIS IS 1 QUESTION YEAR 9 MATHS PLEASE HELP ME
Katyanochek1 [597]
I think it’s B and D
5 0
4 years ago
Read 2 more answers
3.0
Alex73 [517]

Answer:

Solution given:

AD=1.8

AC=3.0

we have

∆ADC is a right angled triangle

Cos A=b/h

<A=cos-¹ (1.8/3)

<A=53.13°

again

∆ABC is a right angled triangle

Tan A=p/b=BC/AC

Tan 53.13×3=BC

BC=4

NOW

Area of triangle =½(AC*BC)=½(4×3)=6 <u>square </u><u>units</u><u> </u><u>is</u><u> </u><u>a</u><u> </u><u>required</u><u> </u><u>area</u><u>.</u>

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3 years ago
write the following sentence as an equation: x is directly proportional to y and is inversely proportional to the cube of z.
Brrunno [24]

Step-by-step explanation:

x=y

y=1/z^3

Now,

for equation,

x=y=1/z^3

5 0
3 years ago
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