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Inessa05 [86]
3 years ago
6

Ellen drove 277.2 miles. For each gallon of gas, the car can travel 21 miles. How many gallons of gas did Ellen use?

Mathematics
2 answers:
stich3 [128]3 years ago
8 0

Answer:

13.2

Step-by-step explanation:

277.2÷21=13.2 gallons

Paul [167]3 years ago
6 0

Answer:

the answer is 13.2

Step-by-step explanation:

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69 points!!!
Amiraneli [1.4K]

Answer:

C)  The solution for the given system of equations are A(0,-5) and B(-4,3)

Step-by-step explanation:

The given system of equation are : x^{2}  + y^{2}  = 25\\2x  + y  = -5

from equation 2, we get   y = -5 - 2x .

Put the above value of y in the equation (1).

We get: x^{2}  + y^{2}  = 25  \implies x^{2}  + (-5-2x)^{2}  = 25

By ALGEBRAIC IDENTITY:

(a+b)^{2}   = a^{2}  +  b^{2}  + 2ab\\ (-5-2x)^{2} = (-5)^{2}  +  (-2x)^{2}  + 2(-5)(-2x)

or, x^{2}  + (-5-2x)^{2}  = 25  \implies x^{2} + (25  +  4x^{2}  + 20x)  = 25

or, 5x^{2}  + 20x = 0  \implies x(5x + 20) = 0

⇒ x = 0 or,   x  = -20/5 = -4

So, the possible values for x are: x  = 0 or  x  = -4

If x  = 0, y = -5-2x = -5-2(0) = -5

and if x = -4, y = -5 -2(-4)   = -5 + 8  = 3

Hence, the solution for the given system of equations are A(0,-5) and B(-4,3)

8 0
3 years ago
An ant has 6 legs how many legs do 8 arts have
Sergio039 [100]
48. 6 legs x 8 ants = 48 legs.
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The radius of a circle is 4 1/2 inches. What is the circles circumference in terms of 3.14 (pie)
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The circumference of a circle can be found using the equation 2 π r

(2)(3.14)(4.5) = 28.26   (or 28 13/50 if you need it in fractions)
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What is 4.9987 rounded to the nearest houndred
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5.00 is the answer! It is very close to 5 therefore it would immediately go to 5!
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Here are the scores that Jenna has
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Answer:

the variance is 6.6

sry for not showing work

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