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omeli [17]
3 years ago
15

A+a+d+a = 11. what are there values​

Mathematics
1 answer:
Zolol [24]3 years ago
6 0
A=3 which would give you 9. So all you have left from 11 is 2. So D=2. Guess and check to get answers. There are multiple you could have. Not sure but that’s what I’d put
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She determined that the food court is at point (1, 1), the restrooms are at point (4, 3), the candy shop is at point (-6, 1), th
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B) the food court and the boutique.   &
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Solve for y.<br> -1 = 8+3y<br> Simplify you answer as much as possible.
OleMash [197]

Answer:

-3

Step-by-step explanation:

8+3y = -1\\3y = -9\\y = -3

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3 years ago
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A point with coordinates (a, b) is plotted on a coordinated plane. The values of a and b can be any positive or negative integer
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Step-by-step explanation:

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3 0
3 years ago
Subtract (8x – 2) – (5х – 7)
professor190 [17]

Answer: 3x - 9

Step-by-step-explanation: To solve the expression (8x – 2) – (5х – 7) we will be using properties of operations. First, use the commutative and associative properties to move the values next to each other to combine like terms.

(8x – 2) – (5х – 7)

(8x-5x)+(-2-7)

3x-9

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7 0
3 years ago
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A study was conducted to determine if the salaries of librarians from two neighboring cities were equal. A sample of 15 libraria
AURORKA [14]

Answer:

Step-by-step explanation:

The formula for determining the confidence interval for the difference of two population means is expressed as

Confidence interval = (x1 - x2) ± z√(s²/n1 + s2²/n2)

Where

x1 = sample mean salary of city 1 librarians

x2 = sample mean salary of city 2 librarians

s1 = sample standard deviation for city 1

s2 = sample standard deviation for city 2

n1 = number of soles for city 1

n1 = number of soles for city 2

For a 95% confidence interval, we would determine the z score from the t distribution table because the number of samples are small

Degree of freedom =

(n1 - 1) + (n2 - 1) = (15 - 1) + (15 - 1) = 28

z = 2.048

x1 - x2 = 28,900 - 30,300 = - 1400

Margin of error = 2.048√(s1²/n1 + s2²/n2) = 2.036√(2300²/15 + 2100²/15)

= 1647

The upper boundary for the confidence interval is

- 1400 + 1647 = 247

The lower boundary for the confidence interval is

- 1400 - 1647 = - 3047

6 0
3 years ago
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