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nirvana33 [79]
2 years ago
12

Simplify by combining like terms. Type the terms in alphabetical order. -7a-2y+7+2y+5a=

Mathematics
1 answer:
alexira [117]2 years ago
3 0

- 2a + 7

...............

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Can someone please help me with this!!
Aloiza [94]

Answer:

407 yd^{2}

Step-by-step explanation:

first find the area of the rectangle, which would be 16*13 = 208yd²

then find the arc length of the sector, which is about 30.6yd

use the arc length to find the area of the sector, which is about 199.09yd²

add together the area of the rectangle and sector:

199.09 + 208 ≈ 407

8 0
3 years ago
The probability of being a universal donor is 6% (O-negative-blood type). Suppose that 6 people come to a blood drive.' a) What
Tcecarenko [31]

Answer:

Mean = 0.36

SD = 0.5817

P(x=3) = 0.003588

Step-by-step explanation:

Given

Let

A = Event of being a universal donor.

So:

P(A) = 0.06

n = 6

Solving (a): Mean and Standard deviation.

The mean is:

Mean = np

Mean = 6 * 0.06

Mean = 0.36

The standard deviation is:

SD = \sqrt{np(1-p)}

SD = \sqrt{6*0.06*(1-0.06)}

SD = \sqrt{0.3384}

SD = 0.5817

Solving (b): P(x = 3)

The event is a binomial event an dthe probability is calculated as:

P(x) = ^nC_x * p^x * (1-p)^{n-x}

So, we have:

P(x=3) = ^6C_3 * 0.06^3 * (1-0.06)^{6-3}

P(x=3) = ^6C_3 * 0.06^3 * (1-0.06)^3

P(x=3) = 20 * 0.06^3 * (1-0.06)^3

P(x=3) = 0.003588

7 0
2 years ago
Given An = 5a(n-1) where a1= 2. What are the first 4 terms
nexus9112 [7]

Answer:

2, 10, 50, 250

Step-by-step explanation:

Using the formula with a₁ = 2 , then

a₂ = 5a₁ = 5 × 2 = 10

a₃ = 5a₂ = 5 × 10 = 50

a₄ = 5a₃ = 5 × 50 = 250

The first 4 terms are 2, 10, 50, 250

8 0
3 years ago
I need help with question 1 please. I’ll mark brainliest
Dvinal [7]
It is x^2-2x-9 since u just subtract both equations
4 0
2 years ago
Read 2 more answers
jamal deposits 2,500 into each of two savings accounts.The first account has a 4% annual simple interest .Account two earns 5% a
nika2105 [10]

Answer:

$5,675

Step-by-step explanation:

you would just take 4% and 5% of 2500 which is 100 and 125 and multiply them both by 3 which is 300 and 375 and add them both to the 2500 which is 2800 and 2875 and since it asks for the sum you would add then to get a total of $5,675

7 0
3 years ago
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