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stich3 [128]
3 years ago
6

Jack orders a salad with 2 dressings for lunch. There are 13 dressings to choose from. How many different ways can he select a s

alad?

Mathematics
2 answers:
Bumek [7]3 years ago
8 0

Answer:

26 different ways of selecting a salad

Step-by-step explanation:

multiply 13 times 2 to find the number of possibilities

lorasvet [3.4K]3 years ago
3 0

Answer:

78

Step-by-step explanation:

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Which of the following is a factor of both f(x)=x^2-4x-45 and g(x)=x^2-25
wolverine [178]

Answer:

-5

Step-by-step explanation:

x² - 4x - 45 = 0

(x - 9)(x + 5) = 0

x = 9 or -5

x² - 25 = 0

(x + 5)(x - 5) = 0

x = 5 or -5

-5 is a common factor between both of them

8 0
2 years ago
Xavier collected 12 shells at the beach. Nora collected 5 fewer than Xavier. How many shells did Nora collect?
Ulleksa [173]

Answer:

7, Nora collected 7 shells.

Step-by-step explanation:

Xavier collected 12 shells whilist she collected 5 fewer then Xavier.

12 - 5 = 7

Therefore, Nora collected 7 shells at the beach.

8 0
3 years ago
A psychological experiment was conducted to investigate the length of time (time delay) between the administration of a stimulus
aleksklad [387]

Answer:

The P-value of this sample is 0 and is less than the significance level (0.05), so the effect is significant and the null hypothesis is rejected.

As there is significant evidence to reject H_0: \mu= 1.6, we can say that there is significant evidence to claim that the mean time delay for the hypothetical population of all persons who may be subjected to the stimulus differs from 1.6 seconds.

The significance level for this test is 0.05.

Step-by-step explanation:

In this case, we want to prove if there is significant evidence that the mean differs from 1.6 seconds. That is the same as having evidence to reject the the hypothesis H_0:\mu= 1.6 (the null hypothesis always have the equal sign).

We have to test the null hypothesis

H_0:\mu= 1.6

The significance level for this test is 0.05

Calculation of the t-statistic:

t=\frac{M-\mu}{s/\sqrt{n}} =\frac{2.2-1.6}{0.57/\sqrt{36}} =\frac{0.6}{0.063}= 9.47

If we look up in a t-table for t=9.47 and df=(36-1)=35, we get this value appears with a probability of zero. A large number like that is very unlikely to happen.

The P-value of this sample is 0 and is less than the significance level (0.05), so the effect is significant and the null hypothesis is rejected.

As there is significant evidence to reject H_0: \mu= 1.6, we can say that there is significant evidence to claim that the mean time delay for the hypothetical population of all persons who may be subjected to the stimulus differs from 1.6 seconds.

6 0
3 years ago
You fly in a helicopter for 20 minutes that goes at a speed of 240 km per hour. How far did you go?
kondaur [170]
80KM IN THOSE 20 MINUTES

7 0
3 years ago
Read 2 more answers
When viewed from the front, the rope used to tie down a tent forms a pair of supplementary angles with the ground. Find $m\angle
pentagon [3]

Answer:

<ABC = 49°

Step-by-step explanation:

The sum of two supplementary angle is 180. From the diagram, the two angles are 3x+4 and 8x+11. IF this two angles are supplementary then;

3x+4+8x+11 = 180

11x+15= 180

11x = 180-15

11x = 165

x = 165/11

x = 15

From the attached diagram, <ABC = 3x+4

<ABC = 3(15)+4

<ABC = 45+4

<ABC = 49°

3 0
3 years ago
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