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mrs_skeptik [129]
3 years ago
14

Dave has $70 saved and earns $20

Mathematics
1 answer:
kaheart [24]3 years ago
4 0

Answer:

10 months

Step-by-step explanation:

Please let me know if you want me to write an explanation for my answer :)

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Let f(x) = x^2 + 4x - 31. for what value of a is there exactly one real value of x such that f(x) = a?
allsm [11]
This value of "a" is exactly the y-coordinate of the vertex of the parabola
y = x%5E2+%2B+4x++-+31.

To find it, complete the square:

x%5E2+%2B+4x++-+31 = %28x%2B2%29%5E2+-+4+-+31 = %28x%2B2%29%5E2+-+35.

So, this value of "a" is a = -35.










Figure. Plot y = x%5E2+%2B+4x++-+31.


5 0
3 years ago
Which equation demonstrates the distributive property? A) 2 (5 + 7) = 2 (7 + 5) B) 2 (5 + 7) = 2 × 5 + 2 × 7 C) (2 × 5) × 7 = 2
Sonbull [250]

Answer:

B

Step-by-step explanation:

Distributive property is when you distribute the values in a parenthesis with the outside multiplying factor

2*(5+7)= 2*5 + 2*7

2*(12) = 10 +14

24 = 24

distributive property holds true

4 0
3 years ago
Multiply:<br><br> (-4 + i)(-1 + 5i)
Olegator [25]

Answer:

( - 4 + i) ( - 1 + 5i) \\  = 4 - 20i - 1i + 5 {i}^{2}  \\  = 4 - ( -21i )+ 5i {}^{2}

3 0
4 years ago
Factor to find the zeros of the function defined by the quadratic expression.
wel
Hi there! The answer is A) x = 3 or x = 6

2 {x}^{2}  - 18x + 36 = 0
Divide by 2.

{x}^{2}  - 9x + 18 = 0
Factor.

(x - 3)(x - 6) = 0
Use the rule AB = 0 gives A = 0 or B = 0

x - 3 = 0 \:  \: or \:  \: x - 6 = 0 \\ x = 3 \:  \:   \:  \:  \:  \:  \:  \:  \: or \:  \: x = 6

The answer is A) x = 3 or x = 6

4 0
4 years ago
Read 2 more answers
(I WILL GOVE BRAINLIST, THANKS, AND 5 STAR) 9)
VMariaS [17]

Answer:

1. She must collect 45 more skins.

Step-by-step explanation:

300/100 = 3

3 = 1%

50 x 3 + 150

35 x 3 + 105

150 - 105 + 45

8 0
3 years ago
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