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slamgirl [31]
3 years ago
10

Laura has $30 to spend on food for the week. Which inequality represents this? x < 30 x < 30 x > 30 x > 30

Mathematics
2 answers:
Katen [24]3 years ago
7 0
The answer is B, she cant spend more, and she can spend less than $30.
steposvetlana [31]3 years ago
6 0

In the given question Laura has $30 to spend on food for the week.

According to the question we have to set the inequality between total amount and amount spent on food.

Amount spend by Laura on food for the week = $30

Let the amount spent by Laura on food be x

So she has to spend up to $30

So inequality will be x\leqslant 30

So option b is the answer

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3 0
2 years ago
Farmer Jones raises ducks and cows. He looks out his window and sees 54 animals with a total of 122 feet. If each animal is “nor
Olenka [21]

Answer:

He have <u>47</u> ducks and <u>7</u> cows.

Step-by-step explanation:

Given:

Farmer Jones raises ducks and cows.

He looks out his window and sees 54 animals with a total of 122 feet.

Now, to find the each type of animal he have.

Let the number of ducks be x.

And the number of cows be y.

So, total number of animals are:

x+y=54

x=54-y  ....( 1 )

As, the feet of cows are 4 and ducks are 2.

Now, the total number of feet are:

2(x)+4(y)=122

2x+4y=122

Substituting the value of x from equation (1) we get:

2(54-y)+4y=122

108-2y+4y=122

108+2y=122

<em>Subtracting both sides by 108 we get:</em>

2y=14

<em>Dividing both sides by 2 we get:</em>

y=7.

<em>The number of cows = 7.</em>

Now, to get the number of ducks we substitute the value of y in equation (1):

x=54-y\\x=54-7\\x=47.

<em>The number of ducks = 47.</em>

Therefore, he have 47 ducks and 7 cows.

4 0
3 years ago
4) (3x² + 5) + (3 – 7x²)<br><br>What kind of math problem is this then simplify it​
olga2289 [7]
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P- parentheses
E-exponents
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D- divide
A- addition
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3 0
3 years ago
Read 2 more answers
A sample of 75 information systems managers had an average hourly income of $40.75 with a standard deviation of $7.00. The 95% c
lorasvet [3.4K]

Answer:

The 95% confidence interval for the average hourly wage of all information system managers is (39.14,42.36)

Step-by-step explanation:

In order to calculate the 95% confidence interval for the average hourly wage we would have to calculate first the margin of error as follows:

ME=t0.05/2,n-1s/√n

for n=75, t0.025,74=1.993

Therefore, ME=1.993*7/√75

ME=1.61

Therefore, the 95% confidence interval for the average hourly income of all syatem manager would be as follows:

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=(39.14,42.36)

8 0
3 years ago
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Answer:

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Step-by-step explanation:

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=> -5 + 1 / 4

=> -4 / 4

=> -1

6 0
2 years ago
Read 2 more answers
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