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vodomira [7]
3 years ago
5

In three days Speedy the squirrel ate 30 peanuts. On both the second and third day, Speedy ate 7 peanuts more than on the day be

fore. How many peanuts did Speedy eat the first day?
Mathematics
2 answers:
rusak2 [61]3 years ago
7 0

Answer:the answer is my nballs

Step-by-step explanation:

Vedmedyk [2.9K]3 years ago
7 0

Answer:

3 peanuts

Step-by-step explanation:

x represents peanuts eaten on first day

30 peanuts eaten in 3 days

7 more peanuts eaten every day after first day which gives the equation:

x+(x+7)+(x+14) = 30

3x+21 = 30

3x = 9

x=3

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Multiplying a certain even number by 4 then subtracting 16 gives you the next consecutive even number. Find the original number
anyanavicka [17]

Let 2k represent the original even number (such that k is an integer)

then 2(k + 1) is the next consecutive even number.

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3 0
3 years ago
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ZanzabumX [31]
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3 0
3 years ago
What is the solution of the equation. find the value of y when x equals -10. 2x - 9y = -38
cestrela7 [59]

Answer:

y =2

Step-by-step explanation:

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4 0
1 year ago
Let x^2+15x=49
Slav-nsk [51]
<span>x^2 + 15x + 56.25 = 105.25

    "Completing the square" is one of many different techniques for solving a quadratic equation. What you do is add a constant to both sides of the equation such that the lefthand side can be factored into the form a(x+d)^2. For instance, squaring (X+D) = X^2 + 2DX + D^2. Notice the 2DX term. That is the same term as the 15x term in the problem. So 2D = 15, D = 7.5. And D^2 = 7.5^2 = 56.25.
So we have
 x^2 + 15x + 56.25 = 49 + 56.25
 Which is
 x^2 + 15x + 56.25 = 105.25
  Which is the answer desired.

   Now the rest of this is going beyond the answer. Namely, it's answering the question "Why does complementing the square help?" Well, we know that the left hand side of the equation can now be written as
 (x+7.5)^2 = 105.25

   Now take the square root of each side
 (x+7.5) = sqrt(105.25)

   And let's use both the positive and negative square roots.
So x+7.5 = 10.25914226
 and
 x+7.5 = -10.25914226

   And let's find X.
 x+7.5 = 10.25914226
 x = 2.759142264

   x+7.5 = -10.25914226
 x = -17.75914226

   So the roots for x^2 + 15x - 49 is 2.759142264, and -17.75914226</span>
3 0
3 years ago
Read 2 more answers
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