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Delicious77 [7]
3 years ago
15

Solve using algebreic methods y=x^2+5x, y=7-x

Mathematics
1 answer:
adelina 88 [10]3 years ago
6 0

Answer:

x = 1 and x = -7

Step-by-step explanation:

Given that,

y=x^2+5x  ...(1)

and

y = 7 -x ....(2)

Put the value of y from equation (2) in (1)

7-x=x^2+5x\\\\x^2+5x-7+x=0\\\\x^2+6x-7=0\\\\x^2+7x-x-7=0\\\\x(x+7)-1(x+7)=0\\\\(x-1)(x+7)=0

So,

x = 1 and x = -7

Hence, the solution of the given equations is x = 1 and x = -7

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fgiga [73]

Answer:

1 1/5

Step-by-step explanation:

12/10=1.2 or 1 1/5

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2 years ago
Rachael is placing a protective cover on a glass case. The case is a cube, and the perimeter of one cube face is 56 inches.
Dmitry_Shevchenko [17]

Answer:

336

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We know that a cube has 6 faces which means we can use this equation:

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The points J, K, L and M all lie on the same line segment, in that order, such that the ratio of JK:KL:LMJK:KL:LM is equal to 1:
RideAnS [48]

Answer: JL = 25

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The total ratio is the sum of each part

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The sum of each part corresponds to the total measure of the line segment. Then:

9d = 45

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JL = d + 4d

JL = 5d

JL = 5.5

JL = 25

Segment JL measures 25 units.

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3 years ago
Anthony is shopping at a discount store. He really wants to buy a jacket that costs $129.99. The jacket is on sale for 25% off.
Blababa [14]

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Step-by-step explanation:

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2 years ago
How do you do this question?
daser333 [38]

Answer:

B. 1/2

Step-by-step explanation:

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\lim_{z \to 0} \frac{-g(z)e^{-z}+g'(z)e^{-z}}{2z-2}

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