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My name is Ann [436]
3 years ago
10

X2 – 1x – 90 = 0 has solutions {a, b}. What is a + b?

Mathematics
1 answer:
s344n2d4d5 [400]3 years ago
3 0

Answer:

a + b =1

Step-by-step explanation:

Write the given quadratic as x^2 – 1x – 90 = 0.  This factors into

(x - 10)(x + 9) = 0, and so the roots/solutions are {-9, 10}.

If we call -9 "a" and 10 "b," then the sum a + b is -9 + 10, or a + b =1.

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A property sells for $140,000 two years after it was purchased. If the annual appreciation rate is 6%, how much did the original
kykrilka [37]

Answer:

$123,200

Step-by-step explanation:

0.06 x 2 = 0.12

140,000 x 0.12 = 16,800

140,000 - 16,800 = 123,200

3 0
3 years ago
Multiply: (5.8 x 10^-6) x (2 x 10^4).
Nitella [24]

Answer:

1.16*10^{-1}

Step-by-step explanation:

(5.8*10^{-6}) *(2*10^{4})\\=11.6*10^{-2}\\=1.16*10^{-1}

6 0
3 years ago
Help me please ASAP
uranmaximum [27]

Perimeter is 24.

Length is 4 greater than the width.

Let's use 'x' for width

we can write this as x+4   +   x+4    +    x    +    x

x+4 being the width+4     and    x being the width

There are 4 sides to a rectangle so you are adding 4 values

Two length and two widths

so  we can then combine  the two lengths to make 2x+8

and then combine the two widths to make 2x

Then put it together.       2x+2x+8= 4x+8

4x+8=24

Subtract 8 from both sides

4x=16

divide both sides by 4

x=4

The width is 4.

6 0
3 years ago
PLEASE HELP ME I DONT UNDERSTAND
max2010maxim [7]

Answer:

no

Step-by-step explanation:

the square root of 2 is not rational

5 0
3 years ago
Good evening! Can someone please answer this, ill give you brainliest and your earning 50 points. Would be very appreciated.
77julia77 [94]

Answer:

see explanation

Step-by-step explanation:

1 vertex form

2 factored form

3 standard form

7 0
2 years ago
Read 2 more answers
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