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Len [333]
3 years ago
11

Tim has already earned $30 mowing lawns. He earns $10 per lawn. Write and solve an inequality to determine how many more lawns h

e will have to mow to have at least $75 for a new lawnmower. Interpret the solution.
Mathematics
1 answer:
Fantom [35]3 years ago
5 0

Answer:

Tim needs to mow 5 more lawns in order to buy his new lawnmower

Step-by-step explanation:

1) Tim has already mowed $30 worth of lawns

2) Tim makes $10 per mow

4) Tim needs to make $75 total for his new mower

5) $75 - $30 = $45

6) Tim needs to make $45 in order to get his new mower

7) 5 x 10 = 50

8) Tim needs to mow 5 lawns in order to make over $45

9) If Tim only mowed 4 lawns he would make $40 and still be $5 short

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Citrus2011 [14]

Answer:

There is enough evidence to say that the true average heat output of persons with the syndrmoe differs from the true average heat output of non-sufferers.

Step-by-step explanation:

We have to perform a hypothesis test on the difference between means.

The null and alternative hypothesis are:

H_0: \mu_1-\mu_2=0\\\\H_a: \mu_1-\mu_2

μ1: mean heat output for subjects with the syndrome.

μ2: mean heat output for non-sufferers.

We will use a significance level of 0.05.

The difference between sample means is:

M_d=\bar x_1-\bar x_2=0.63-2.09=-1.46

The standard error is

s_{M_d}=\sqrt{\sigma_1^2/n_1+\sigma_2^2/n_2}=\sqrt{0.3^2/9+0.5^2/9}=\sqrt{ 0.038 } \\\\ s_{M_d}=0.194

The t-statistic is

t=\dfrac{M_d}{s_{M_d}}=\dfrac{-1.46}{0.194}=-7.52

The degrees of freedom are

df=n_1+n_2-2=9+9-2=16

The critical value for a left tailed test at a significance level of 0.05 and 16 degrees of freedom is t=-1.746.

The t-statistic is below the critical value, so it lies in the rejection region.

The null hypothesis is rejected.

There is enough evidence to say that the true average heat output of persons with the syndrmoe differs from the true average heat output of non-sufferers.

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2 years ago
dose choosing a blue marble rwpresent the complment event of choosing a red marble? Explain. help plz and thx
denis23 [38]
Im confused what you just said
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2 years ago
Please help mee What is the smallest positive integer whose proper divisors add up to more than the integer itself?
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Answer:

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Step-by-step explanation:

The proper divisors of 12 are

1 2 3 4 6

Add those together you get 16

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The nurse must give a patient 9 milligrams of a medication. If the tables are 2 milligrams each, how many tablets are needed?
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Answer:

4.5 tablets.

Step-by-step explanation:

We just divide 9 by 2.

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1 year ago
NEED HELP ASAP!! WILL MARK YOU BRAINLIEST IF RIGHT!!!!​
Ket [755]

So 4x^2+-2x+-6 then multiply by 5 would be the Area of the entire rectangle using the formula A=bh

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