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NNADVOKAT [17]
2 years ago
11

The sum of two number is 50,and their difference is 30.find the numbers​

Mathematics
2 answers:
Mrac [35]2 years ago
6 0

Answer:

40 and 10

Step-by-step explanation:

if you add them you get 50 and if you subtract them you get 30

rodikova [14]2 years ago
3 0

Answer:

40 and 10

Step-by-step explanation:

Let the bigger number = x

Let the smaller number = y

x+y=50

x-y=30

(add the equations)

(x+x)+(y-y)=(50+30)

2x=80

x=40

x+y=50

40+y=50

y=10

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A snow plough has a 3.2m blade set at an angle of 30 degrees How wide a path will the snow plough clear
snow_tiger [21]

Answer:

1.6m

Step-by-step explanation:

The length of the blade is 3.2m

The angle which the blade makes is 30°

Assuming the path of the blade and the length it covers is a right-angled triangle,

The length of the blade is the hypothenus while the path at which it clears is the opposite of the triangle.

See attached document for better illustration.

Using SOHCAHTOA,

Sinθ = opposite / hypothenus

opposite = x

hypothenus = 3.2

θ = 30°

Sin30 = x / 3.2

X = 3.2sin30

X = 3.2 × 0.5

X = 1.6m

The path which the snow plough clears is 1.6m

6 0
3 years ago
How many distinct triangles can be drawn by using three of the seven dots below? (Two triangles are considered different if they
jeka57 [31]

Answer:

35triangles

Step-by-step explanation:

Given

Total distinct points = 7

If we are to form triangles using the dots,

Total points in a triangle = 3

Using the combination rule;

number of triangles formed = 7C3

7C3 = 7!/(7-3)!3!

7C3 = 7!/4!3!

7C3 = 7*6*5*4!/4!3!

7C3 = 7*6*5/6

7C3 = 7*5

7C3 = 35

Hence the amount of triangles that can be formed is 35triangles

5 0
3 years ago
If you work for an hourly wage, your gross pay is a function of the number of hours that you work. Your hourly wage is $8.50 per
Ket [755]

Answer:

f(n) = 8.5n

Step-by-step explanation:

$8.50 * n = Gross

3 0
3 years ago
According to the US Census, Virginia had about 7.1 million residents in 2000. Of those, 24.6% were under age 18. To the nearest
Mazyrski [523]

7.1 Million × 0.246 = 1.7466 = 1.7 Million

4 0
2 years ago
A cone has a radius of 4 units and a height of 6 units.
Usimov [2.4K]
We know, Volume of a Cylinder = πr² h/3
v = 3.14 * 4² * 6/3
v = 3.14 * 16 * 2
v = 100.48 

In short, Your Answer would be Option B

Hope this helps!
7 0
3 years ago
Read 2 more answers
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