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3 years ago

Find the difference. Write your answer in simplest form.

Mathematics

1 answer:

alexdok [17]3 years ago

6 0

Answer:

1/2

Step-by-step explanation:

Subtract the numerators.

9-4=5

The denominator remains the same

5/10, which can be simplified to 1/2

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Tim and his brother are building towers out of blocks. Tim is using blue blocks that are 6 cm tall and his brother is using gree

Ber [7]

Answer:

The shortest they could have made it is 24cm. Tim used four blue blocks (6x4=24) and his brother used 3 green blocks (8x3=24)

8 0

3 years ago

Jacie is serving steak and chicken she wants to have at least 20 pounds of meat. Steak is $8 per pound and chicken is $4 per pou

Nady [450]

Answer:

She can get 10 pounds of steak and 10 pounds of chicken.

Step-by-step explanation:

As Jacie wants to have at least 20 pounds of meat, you can write the following equation:

x+y=20, where

x refers to the pounds of steak

y refers to the pounds of chicken

Also, since the statement indicate that the steak is $8 per pound and chicken is $4 per pound and Jacie wants to spend at most 120 dollars on meat, you can write the following equation:

8x+4y=120

So, you have the following equations:

x+y=20 (1)

8x+4y=120 (2)

Now, you can solve for x in (1):

x=20-y (3)

Then, you can replace (3) in (2) and solve for y:

8(20-y)+4y=120

160-8y+4y=120

160-120=8y-4y

40=4y

y=40/4

y=10

Finally, you can relace the value of y in (3) to find x:

x=20-y

x=20-10

x=10

According to this, the answer is that she can get 10 pounds of steak and 10 pounds of chicken.

7 0

3 years ago

Read 2 more answers

A test consists of 100 multiple choice questions, each with five possible answers, only one of which is correct. Find the mean a

TEA [102]

Answer: Mean = 20 and standard deviation = 4

Step-by-step explanation:

Let x represents the success of getting the correct answer.

Here, the total number of trials(n) = 100

The probability of getting the correct answer, p = 1/5

Thus, the mean of the number of correct answer,

$\mu_x= np$

$\mu_x= 100\times 1/5$

$\mu_x= 20$

Now, the standard deviation, $\sigma_x= \sqrt{n\times p\times (1-p)}$

$\sigma_x= \sqrt{100\times 1/5\times 4/5}$

$\sigma_x= \sqrt{16}$

$\sigma_x= 4$

Thus, First option is correct.

6 0

4 years ago

What is the domain of (-2, 5), (8, 6), (3, 12) (2, 6)

lord [1]

Answer:

The domain is (-2, 8, 3, 2)

Step-by-step explanation:

The domain is such because domain is the x-element or the one you see at first in the ordered pairs.

4 0

3 years ago

Summer uses 0.4 gallon of gasoline each hour mowing lawns. how much gas does he use in 4.2 hours

hammer [34]

1.68 gallons will be used

7 0

3 years ago

Read 2 more answers