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Ira Lisetskai [31]
2 years ago
9

Please help

Mathematics
2 answers:
wariber [46]2 years ago
7 0
<h2>Answer:</h2><h2>67.5 square feet</h2><h2></h2><h2>Step-by-step explanation:</h2><h2>Multiply 15 and 9</h2><h2>= 135</h2><h2 /><h2>Divide by 2</h2><h2 /><h2>135 ÷ 2</h2><h2 /><h2>= 67.5</h2>

<h2><u>Final answer: 67.5 square feet</u></h2>
netineya [11]2 years ago
6 0

Answer:

Option c - 67.5

Step-by-step explanation:

Base= 15

Height = 9

Area= 1/2 x b h = 1/2 x 9 x 15 = 67.5 feet

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Can anyone help me??
DiKsa [7]

I think it's the second one, 3 1/3

4 0
3 years ago
At a fabric store, fabrics are sold by the yard. A dressmaker spent $36.35 on 4.25 yards of silk and cotton fabrics for a dress.
vaieri [72.5K]

Given:

The system of equations that represent the constraints for the given situation is

x+y=4.25

16.90x+4y=36.35

To find:

The solution of given system of equations.

Solution:

We have,

x+y=4.25           ...(i)

16.90x+4y=36.35           ...(ii)

Multiply equation (i) by 4.

4x+4y=17           ...(iii)

Subtracting (iii) from (ii), we get

16.90x+4y-(4x+4y)=36.35-17

16.90x+4y-4x-4y=19.35

12.90x=19.35

Divide both sides by 12.90.

x=\dfrac{19.35}{12.90}

x=1.5

Put this value in (i).

1.5+y=4.25

y=4.25-1.5

y=2.75

The solution of system of equations is x=1.5 and y=2.75. It means, the yards of silk are 1.5 and yards of cotton are 2.75.

5 0
3 years ago
A normal distribution has a mean of 101 and a standard deviation of 3.4. What is the z-score of 105? Enter your answer, rounded
oee [108]

Answer:

Z-score = 1.18

Step-by-step explanation:

The z-score measures how many standard deviations from the mean a data is

Therefore the z score is the quotient between the difference between a value and the mean and the standard deviation

Z =\frac{X-\mu}{\sigma}

Where

μ is the mean, x is a data of the population and \sigma is the standard deviation

In this case

\mu =101\\\\\sigma = 3.4\\\\X = 105

Then the z-score is

Z = \frac{105-101}{3.4}\\\\Z = 1.18

4 0
3 years ago
A photo processing place can develop 416 photos in 8 hours. How many photos can it develop every hour?
Rina8888 [55]

Answer:

52 photos per hour

Step-by-step explanation:

8 goes into 400 50 times, and goes into the remaining 16 twice. Therefore, 416 photos/8 hour=52

5 0
3 years ago
Gotta go back to school today..
PIT_PIT [208]

Answer:

I  believe its 33.60 because if you add up 33.+5% that would give you 33.6 so its 33.60

Step-by-step explanation:

Hope its right

3 0
3 years ago
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