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Rina8888 [55]
2 years ago
8

Find the values of x and y. 18. 120°=(2x + y)° (2x - y)°=140°

Mathematics
1 answer:
sleet_krkn [62]2 years ago
8 0

Answer:

x = 65, y = - 10

Step-by-step explanation:

Given the 2 equations

2x + y = 120 → (1)

2x - y = 140 → (2)

Adding the 2 equations term by term will eliminate y, that is

4x = 260 ( divide both sides by 4 )

x = 65

Substitute x = 65 into either of the 2 equations and evaluate for y

Substituting into (1)

2(65) + y = 120

130 + y = 120 ( subtract 130 from both sides )

y = - 10

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250 students out of 3,000 have found that math is their favorite subject among 10 subjects they are studying. If the choice of f
Oksi-84 [34.3K]

Answer:

The randomization distribution is created under the assumption that H₀: p = 0.1

The randomization distribution will also be centred at 0.1

Step-by-step explanation:

If the distribution was truly random, 1 out of 10 students will choose math as his/her favorite subject.

This means that the randomization will have the null hypothesis saying that the proportion of students who will choose maths as their favourite subject = 0.1

Mathematically, it'll be written as

The null hypothesis is given as

H₀: p = 0.1

And the randomization distribution will be centred at 0.1 too.

The alternative hypothesis will now prove the theory they're looking to see in the question that

Hₐ: p < 0.1

Hope this Helps!!!

5 0
3 years ago
Which table represent a linear function
andrew-mc [135]
The first one it goes up in the same increments
8 0
2 years ago
Evaluate the expression when g=8 and h=7. <br> 4g-h
Lelechka [254]
25 because 4(8)-7 = 32-7 = 25
3 0
2 years ago
Read 2 more answers
A tree farm owner uses a grid to mark where to plant trees in the spring. The first tree is planted at (2, 3). Each of the other
Tatiana [17]

Answer:

See attached image for the drawing of the first four trees (circled in green)

The patterns is:

x = 2+3n  and  y= 3+2n

Position of 7th tree is: (20,15) (circled in orange in the image)

Step-by-step explanation:

Starting at the location (2,3) the next x and y positions are given by:

x = 2+3n since the horizontal position needs to be increased by 3 units on each iteration,

and y= 3+2n since the vertical position needs to be increased by 2 units on each iteration

being n= 1 through 6 (to account for the next 6 trees that need to be planted)

With such pattern, the location of the seventh tree would be:

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y = 3 + 2*6 = 3 + 12 = 15

That is, the point (20,15) on the plane.

Also see attached image.

8 0
3 years ago
What is the length of the diagonal of a 10 foot by 8 foot rectangle?
zloy xaker [14]
Diagonal of a rectangle formula:

Diagonal = √l² + w²
Diagonal = √10² + 8²
Diagonal = √100 + 64
Diagonal = √164
Diagonal = 12.806 feet.

Or you can use the pythagorean theorem. The diagonal of a rectangle is the hypotenuse of a triangle.

a² + b² = c² ; where a and b represents the lengths of the triangle and c is the hypothenuse. In this case, the lengths are 10 ft and 8ft.

10² + 8² = 100 + 64 = 164 ; This represents c².
c = √c² = √164 = 12.806 ft
6 0
3 years ago
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