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Stella [2.4K]
3 years ago
10

Help with some homework please

Mathematics
1 answer:
LUCKY_DIMON [66]3 years ago
8 0
Sorry I don’t get this one anymore ???
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Write the equation of the circle with center (7,-2) and radius square root 61. Please show your work!
Vladimir79 [104]
The equation of a circle is (x - h)^2 + (y - k)^2 = r^2
x and y are left alone in a circle equation, while h and k are the coordinates of the center.

Thus, our equation is (x - 7)^2 + (y + 2)^2 = 61
5 0
3 years ago
50% of 80<br> 50% of 48<br> 50% of 15<br> 25% of 120<br> 25% of 90
Semenov [28]
1. 40
2. 24
3. 7.5
4. 30
5. 22.5
3 0
3 years ago
Here is a supermarket selles a breakfast cereals three different sizes of box 250g £2.90 350g £4.20 450g £5.31 wich size of the
yanalaym [24]
Box 250 because it’s the most medium weight
3 0
3 years ago
No one answered it last time :(
azamat

Answer:

Step-by-step explanation:

The perimeter is 28".

The total length of three sides of the square = 28-5-5 = 18", so the side length of the square is 18/3 = 6".

The area of the triangle is ½(6)(4) = 12 square inches.

The area of the square is 6² = 36 square inches.

Total area = 12+36 = 48 square inches.

5 0
3 years ago
Environmentalists concerned about the impact of high-frequency radio transmissions on birds found that there was no evidence of
babunello [35]

Answer:

No, we cannot conclude anything about 0.10

Yes, they have made the same decision.

Step-by-step explanation:

Consider the provided information.

Part (A)

They based this conclusion on a test using α = 0.05. Would they have made the same decision at α = 0.10

A significance level of 0.05 indicates a 5% risk of concluding that a difference exists

From the normal table the critical value is Z(0.05) = 1.645 and we accept null hypothesis.

If α = 0.1, the critical value is Z(0.1)=1.28

1.28 is less than 1.645.

Therefore, we cannot conclude anything about 0.10

Part (B)

α = 0.01, the critical value is Z(0.01)=2.33

The critical value of α = 0.05 is 1.645 which is less than 2.33,

So we would again reject the null hypothesis.

Hence, they have made the same decision.

6 0
3 years ago
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