2 years ago

Four times the sum of 4 and some number is 40

Mathematics

2 answers:

pochemuha2 years ago

5 0

4 + 6 = 10

10 * 4 = 40.

The full equation looks like this....

4(4+6)

"Some Number" is 6.

zubka84 [21]2 years ago

3 0

The front door of a house is 80 inches tall what is the volume of the door in cubic inches

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4. If 30 locusts eat 420 grams of grass in a week. How many days will it

attashe74 [19]

Answer:

The amount one locust eats in a week is 420/30 = 14 grams so it eats 14/7 = 2 grams per day, therefore 21 locusts can eat 21 * 14 = 42 grams per day. 420 / 42 = 10 so the answer is 10 days or 1 week and 3 days.

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3 years ago

A sample of 64 was taken from a population, with the mean of the sample being 119 and the standard deviation of the sample being

Fofino [41]

We have the sample size, sample mean and the sample standard deviation. Since the population standard deviation is not know, we will use t-distribution to find the confidence interval.

The critical t value for 95% confidence interval and 63 degrees of freedom is 1.998.

The 95% confidence for the population mean will be:

$(119-1.998 *\frac{16}{ \sqrt{64} } ,119+1.998 *\frac{16}{ \sqrt{64} }) \\ \\ 
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Thus, the 95% confidence interval for the population mean will be (115,123)

So, option A is the correct answer

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2 years ago

Chase makes 2 gallons of soup for a dinner party. He serves 10 cups of soups to his guests. How many cups of soup will he have l

iVinArrow [24]

1 gallon = 16 cups

2 gallons = 16 x 2 = 32

32-10=22

there will be 22 cups left over

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3 years ago

Read 2 more answers

X + y2 = 25 x + 3y = 33

Advocard [28]

Are these 2 different questions or is this one equation

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2 years ago

Whatbis the missing numerator of [2]5/6=?/6

Eva8 [605]

Answer:

Step-by-step explanation:

2* 5/6 = x/6

10/6 = x/6

Since the denominators are the same, the numerators are the same

x=10

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2 years ago