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3 years ago

Dina spent 6 dollars on a sandwich. Then she spent 3 dollars on a drink.

Mathematics

2 answers:

Maru [420]3 years ago

8 0

Answer:

Let's look at the 3 sandwiches and 3 soups first and then expand the calculation. There are 9 ways I can have one of the sandwiches and 1 of the soups:

⎛

⎜

⎝

Soup 1

Soup 2

Soup 3

Sandwich 1

Sandwich 2

Sandwich 3

⎞

⎟

⎠

And so we can see that we multiply the number of sandwiches and the number of soups to get the total number of ways to get one of each.

The same works for more categories of choices, and so we multiply the 3 sandwiches, the 3 soups, 4 salads, and 2 drinks to get:

kvv77 [185]3 years ago

7 0

Answer:

Let's look at the 3 sandwiches and 3 soups first and then expand the calculation. There are 9 ways I can have one of the sandwiches and 1 of the soups:

⎛

⎜

⎝

Soup 1

Soup 2

Soup 3

Sandwich 1

Sandwich 2

Sandwich 3

⎞

⎟

⎠

And so we can see that we multiply the number of sandwiches and the number of soups to get the total number of ways to get one of each.

The same works for more categories of choices, and so we multiply the 3 sandwiches, the 3 soups, 4 salads, and 2 drinks to get:

Step-by-step explanation:

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A sample of n = 9 college students is used to evaluate the effectiveness of a new Study Skills Workshop. Each student’s grade po

Vinil7 [7]

Answer:

80% Confidence interval: (0.4603,0.7397)

Step-by-step explanation:

We are given the following in the question:

Sample mean, $\bar{x}$ = MD = 0.60 points

Sample size, n = 9

Sample variance = 0.09

Sample standard Deviation =

$=\sqrt{\text{Sample Variance}} = \sqrt{0.09} = 0.3$

80% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 8 and}~\alpha_{0.20} = \pm 1.397$

$0.60 \pm 1.397(\frac{0.3}{\sqrt{9}} ) = 0.60 \pm 0.1397 = (0.4603,0.7397)$

8 0

4 years ago

(4 - 3x) is greater than or equal to -9

dalvyx [7]

Answer:

x ≤ 13/3

Step-by-step explanation:

4 - 3x ≥ -9

Isolate the variable, x. Treat the ≥ sign as an equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

First, subtract 4 from both side:

4 (-4) - 3x ≥ -9 (-4)

-3x ≥ - 9 - 4

-3x ≥ -13

Next, divide -3 from both sides. Note that when you divide by a negative sign, you must flip the sign:

(-3x)/-3 ≥ (-13)/-3

x ≤ (-13)/(-3)

x ≤ 13/3

x ≤ 13/3 is your answer.

8 0

4 years ago

4(7 + 8m)=8(-1 + 4m)

mr Goodwill [35]

Answer:

There is no solution

Step-by-step explanation:

Let's use distributive property to solve this equation.

4(7+8m) = 8(-1+4m)

28+32m = -8+32m

-32m -32m

28= -8

There is no solution

Hope this helps!

6 0

3 years ago

Sam needs to convert 80 oz to pounds. He knows the 16 oz = 1 lb.

MakcuM [25]

Answer:

5 pounds

Step-by-step explanation:

80 divided by 16 is 5

5 0

3 years ago

Which property of multiplication is shown below?

Sunny_sXe [5.5K]

Answer:

Commutative property

Step-by-step explanation:

Commutative property: In multiplication, when the order of the two numbers are changed, then it doesnot affect the end result.

8 0

2 years ago