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2 years ago

Can someone help me please really need help? I’ll help you back please & thanks

Mathematics

1 answer:

xeze [42]2 years ago

5 0

The answer is 6 days.

This is the equation
30d-60=20d
10d=60
d=6

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On Friday, a local hamburger shop sold a combined total of 294 hamburgers and cheeseburgers. The number of cheeseburgers sold wa

Shalnov [3]

Answer:

98 hamburgers were sold on Friday.

Step-by-step explanation:

294/3=98

98+98=196 cheese burgers

196+98=294 hamburgers and cheeseburgers in total

98 hamburgers

7 0

3 years ago

A country is considering raising the speed limit on a road because they claim that the mean speed of vehicles is greater than 30

kondaur [170]

Answer:

We conclude that speed is greater than 30 miles per hour.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 30 miles per hour

Sample mean, $\bar{x}$ = 35 miles per hour

Sample size, n = 15

Alpha, α = 0.01

Sample standard deviation, s = 4.7 miles per hour

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 30\text{ miles per hour}\\H_A: \mu > 30\text{ miles per hour}$

We use one-tailed(right) t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{35 - 30}{\frac{4.7}{\sqrt{15}} } = 4.120$

Now, $t_{critical} \text{ at 0.01 level of significance, 14 degree of freedom } = 2.624$

Since,

$t_{stat} > t_{critical}$

We fail to accept the null hypothesis and reject it. We accept the alternate hypothesis and conclude that speed is greater than 30 miles per hour.

We calculate the p-value.

P-value = 0.00052

Since p value is lower than the significance level, we reject the null hypothesis and accept the alternate hypothesis. We conclude that speed is greater than 30 miles per hour.

6 0

2 years ago

If a/b=5/3, then 3a=

Komok [63]

Answer:

3a=5b

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Is (x + 1) a factor of 10x^3 - 15x^2 + 7x + 32?

iragen [17]

$10x^3-15x^2+7x+32^{}=0$

we can divide the equation on (x+1) and if we have a real solutons (x+1) is a factor

is a factor because the remainder is 0

so the new form of the equation is

$(x+1)(10x^2-25x+32)$

5 0

1 year ago

The sum of an infinite geometric series is 1,280, while the first term of the series is 160. What is the common ratio of the ser

Arlecino [84]

The sum is 160/(1-r)=1280 where r is the common ratio,
1/(1-r)=1280/160=8
Inverting we get 1-r=1/8, r=7/8.

7 0

3 years ago