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3 years ago

5

Marna is playing a game where you score -5 points each time you guess the correct answer. The goal is to get the lowest score. T

o win the game, Marna must have a score less than -80 points. How many correct answers does Marna need to win the game? Write an inequality.

1 answer:

Mice21 [21]3 years ago

7 0

74 points she would have to answer.

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Calibrating a scale:

lana66690 [7]

Answer:

We conclude that the calibration point is set too high.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 1000 grams

Sample mean, $\bar{x}$ = 1001.1 grams

Sample size, n = 50

Alpha, α = 0.05

Population standard deviation, σ = 2.8 grams

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 1000\text{ grams}\\H_A: \mu > 1000\text{ grams}$

We use One-tailed(right) z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{ 1001.1 - 1000}{\frac{2.8}{\sqrt{50}} } = 2.778$

Now, $z_{critical} \text{ at 0.01 level of significance } = 2.326$

Since,

$z_{stat} > z_{critical}$

We reject the null hypothesis and accept the alternate hypothesis. We accept the alternate hypothesis. We conclude that the calibration point is set too high.

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2 years ago

Help asap will give brainliest

ArbitrLikvidat [17]

<u>Answer:</u>

• Equation = $2(\frac{7}{4}w + w) = 176$

• length = 56 ft

• width = 32 ft

<u>Step-by-step explanation:</u>

The ratio of the length to width is 7:4.

∴ $\frac{l}{w} = \frac{7}{4}$

⇒ $l = \frac{7}{4} w$ [Equation 1]

We know that the perimeter of the garden is 176 feet.

∴ $2(l + w) = 176$

⇒ $2(\frac{7}{4}w + w) = 176$

⇒ $\frac{7}{4} w + w = 88$ [From Equation 1]

⇒ $\frac{7 w + 4w}{4} = 88$

⇒ $\frac{11w}{4} = 88$

⇒ $11w = 352$

⇒ $w = \bf 32 \space\ ft$

We know from Equation 1 that:

$l = \frac{7}{4} w$

∴ $l = \frac{7}{4} (32)$

⇒ $l = \bf 56 \space\ ft$

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1 year ago

How much yarn did Siera use for her project?

Westkost [7]

Answer:

C

Step-by-step explanation:

Well she had 11.5 so subtract how much she has left witch is 5.25 so you get 6.25 = x

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2 years ago

M-18=n<br> Dude this isn't even math

Papessa [141]

Answer:

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Step-by-step explanation:

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2 years ago

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If Jorge walks 1 mile in 1 hour. In 2 hours at the same place, How many yards can Jorge walk now

julsineya [31]

Answer:

3520 yards

Step-by-step explanation:

1 mile in 1 hour.

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3 years ago

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