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Lady_Fox [76]
3 years ago
13

20. Solve the equation x2 - 17x + 72 = 0.

Mathematics
1 answer:
Rina8888 [55]3 years ago
3 0

Answer:

x=8,9

Step-by-step explanation:

x^2-17x+72=0

(x-8)(x-9)=0

x=8,9

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S = 2(l*w + l*h + w*h)
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Bob’s bill for dinner at a Café was $45. In addition he paid 15% tax of the bill, then he paid 15% tip(of the bill without tax).
eimsori [14]
58.50

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5%= 2.25

6.75*2= 13.50


45+ 13.50= 58.50
6 0
3 years ago
Please help me on this, I can't understand this at all!
vladimir1956 [14]

Answer:

a) -0.5 • 1.7 - 0.5 • 1.7

Step-by-step explanation:

I knew this answer. It is in distributive property.

5 0
3 years ago
The sum of two numbers is 27. The larger number is 3 more than the smaller number. What are the two numbers?
pantera1 [17]

The two numbers are 12 and 15

<em><u>Solution:</u></em>

Let the smaller number be "x"

Let the larger number be "y"

Given that,

<em><u>The sum of two numbers is 27</u></em>

Therefore, we frame a equation as:

Smaller number + Larger number = 27

x + y = 27 ------ eqn 1

<em><u>The larger number is 3 more than the smaller number</u></em>

Larger number = 3 + smaller number

y = 3 + x ------- eqn 2

<em><u>Let us solve eqn 1 and eqn 2</u></em>

<em><u>Substitute eqn 2 in eqn 1</u></em>

x + 3 + x = 27

2x + 3 = 27

2x = 27 - 3

2x = 24

<h3>x = 12</h3>

<em><u>Substitute x = 12 in eqn 2</u></em>

y = 3 + 12

<h3>y = 15</h3>

Thus the two numbers are 12 and 15

7 0
2 years ago
I need this before the 24th! <br> 100 points!
Anestetic [448]

Answer:

The interval is [4,7]

Step-by-step explanation:

The rate of change is given by

f(x2) - f(x1)

-------------------

x2 -x1

We want the rate of change to be 56

f(x2) - f(x1)

-------------------  = 56

x2 -x1

We also know that the x2 is 7  so f(x2) = 192

192 - f(x1)

-------------------  = 56

7 -x1

192 - f(x1) = 56( 7 -x1)

192 - f(x1) = 392 -56x1

Now we need to pick points from the table and see where it is true

(6,96)

192 - 96 = 392 -56*6

96=56  False

( 5,28)

192 - 28 = 392 -56*5

164=112  False

(4,24)

192 - 24 = 392 -56*4

168=168  True

The interval is [4,7]

6 0
2 years ago
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