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3 years ago

If you got it correct I will follow and mark it as brilliant answer

Mathematics

1 answer:

Finger [1]3 years ago

6 0

A) 9 + 3x + 6 + 9x + 5
b) 12x + 20

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If f(x) = 6x-4 and g(x) = 2x + 2, find (f-9)(x).

sp2606 [1]

Answer:

=12x2−14x−26

Step-by-step explanation:

(6x−4−9)(2x+2)

4 0

3 years ago

11. At a delicatessen there were 20 different kinds of cheese and 30 kinds of meats. What is the ratio of cheese to meats at thi

goldfiish [28.3K]

Answer:

2 to 3 in simplest form

Step-by-step explanation:

7 0

3 years ago

Suppose the national mean SAT score in mathematics was 510. In a random sample of 60 graduates from Stevens High, the mean SAT s

zalisa [80]

Answer:

We accept the alternate hypothesis and conclude that mean SAT score for Stevens High graduates is not the same as the national average.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 510

Sample mean, $\bar{x}$ = 502

Sample size, n = 60

Sample standard deviation, s = 30

Alpha, α = 0.05

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 510\\H_A: \mu \neq 510$

We use Two-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n-1}} }$ Putting all the values, we have

$t_{stat} = \displaystyle\frac{502- 510}{\frac{30}{\sqrt{60}} } = -2.0655$

Now,

$t_{critical} \text{ at 0.05 level of significance, 59 degree of freedom } = \pm 1.671$

Since,

$|t_{stat}| < |t_{critical}|$

We reject the null hypothesis and fail to accept it.

We accept the alternate hypothesis and conclude that mean SAT score for Stevens High graduates is not the same as the national average.

7 0

3 years ago

Write three different examples of the sum of a quadratic trinomial and a cubic monomial.

polet [3.4K]

Answer:

A trinomial is a sum of three terms, while a multinomial is more than three. Quadratic is another name for a polynomial of the 2nd degree. For example, 2x2 − 7x + 5.

Step-by-step explanation:

hope it help brainliest pls

3 0

3 years ago

Jose is going for a walk. He takes 3 hours to walk 7.5 miles. what is his speed?

Mariulka [41]

Speed=distance/time
Speed=7.5/3
Speed=2.5 mph

7 0

3 years ago