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larisa [96]
3 years ago
11

The Leonardo family saves the same amount of money each month for vacation . From January 1st to September 30th they saved $ 131

4 . How much does the Leonardo family save each month for vacation .
Mathematics
1 answer:
julia-pushkina [17]3 years ago
4 0
You would divide the amount they saved over the period of time by the number of months they spent saving the money. In this case, from January to September would be 9 months. Therefore, $1314 divided by 9 would give you your answer - which is $146 per month.
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marysya [2.9K]
Sum is the result of adding so
12 + x, but i don't see it as a option.
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3 years ago
Select one of the factors of 5x2 + 7x + 2.
Dafna1 [17]
5x² + 5x + 2x + 2
5x(x + 1) + 2(x + 1)

(5x + 2)(x + 1)
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I'm confused. Please help! brainly and 25 points
german

Answer:

This is a line, x>0  (miles cannot be negative)

Step-by-step explanation:

Cost of renting a car =  cost per mile times the number of miles  plus the flat fee

We know the cost per mile = .25 and the flat fee

Let x = number of miles and y = cost of renting a car

y = .25x+15

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2 years ago
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The historical walking tour of a town covers a total distance of 5 miles. The map shows that the path of the tour travels 3 inch
kari74 [83]
Since the problem is given all the total walking distance, the first thing we are going to do is find the total distance in the map:
Diastance_{map}=3+4+2+1
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\frac{5miles}{10inches} = 0.5 \frac{mile}{inch}

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7 0
3 years ago
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Which of the following in an identity?
sammy [17]
By "which is an identity" they just mean "which trigonometric equation is true?"

What you have to do is take one of these and sort it out to an identity you know is true, or...

*FYI: You can always test identites like this:
Use the short angle of a 3-4-5 triangle, which would have these trig ratios:
sinx = 3/5    cscx = 5/3
cosx = 4/5   secx = 5/4
tanx = 4/3    cotx = 3/4
Then just plug them in and see if it works. If it doesn't, it can't be an identity!

Let's start with c, just because it seems obvious.
The Pythagorean identity states that sin²x + cos²x = 1, so this same statement with a minus is obviously not true.

Next would be d. csc²x + cot²x = 1 is not true because of a similar Pythagorean identity 1 + cot²x = csc²x. (if you need help remembering these identites, do yourslef a favor and search up the Magic Hexagon.)

Next is b. Here we have (cscx + cotx)² = 1. Let's take the square root of each side...cscx + cotx = 1. Now you should be able to see why this can't work as a Pythagorean Identity. There's always that test we can do for verification...5/3 + 3/4 ≠ 1, nor is (5/3 +  3/4)².

By process of elimination, a must be true. You can test w/ our example ratios:
sin²xsec²x+1 = tan²xcsc²x
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(9/25)(25/16)+1 = (16/25)(25/9)
(225/400)+1 = (400/225)
(9/16)+1 = (16/9)
(81/144)+1 = (256/144)
(81/144)+(144/144) = (256/144)
(256/144) = (256/144)
5 0
2 years ago
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