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umka21 [38]
3 years ago
5

7 × 3 = 3 × ?

Mathematics
1 answer:
faust18 [17]3 years ago
5 0

Answer:

1. 7

2. 3

3. 9

Step-by-step explanation:

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2x squared + 9x=-5 i need to solve for x
In-s [12.5K]
2x^2+ 9x=-5 \\ \\2x^2 + 9x+5 =0 \\\\a=2, \ \ b=9 , \ \ c=5 \\\\\Delta =b^2-4ac = 9^2 -4\cdot 2\cdot 5 =  81-40=41 \\ \\x_{1}=\frac{-b-\sqrt{\Delta} }{2a}=\frac{-9-\sqrt{41}}{2\cdot 2 }=\frac{-9-\sqrt{41}}{ 4 }\\\\ x_{2}=\frac{-b+\sqrt{\Delta} }{2a}=\frac{-9+\sqrt{41}}{2\cdot 2 }=\frac{-9+\sqrt{41}}{4 }
3 0
3 years ago
29. 83 – 2 · 4 = <br> 30. 3 · 6 – 4 · 2 = <br> 31. 3( 6 – 4) · 2 =
tester [92]

1) 21.83

2)173.8

3)12

Hope this helps :)

4 0
2 years ago
Find two positive numbers whose product is 64 and whose sum is a minimum. (If both values are the same number, enter it into bot
DedPeter [7]

Answer:

X = 8, y = 8

Step-by-step explanation:

This question is an optimization problem. Two equations are going to be needed here

n = x+y

P = xy

Such that 64 = xy

When we divide through by x we get:

y = 64/x

So that n becomes:

n = x + 64/x

n = x+64x^-1

We take derivative

n' = 1-64x^-2

When n' = 0 then a min|max occurs

0 = 1-64x^-2

Such that:

64/x² = 1

Divide through by x²

64 = x²

x = √64

x = 8

Remember y = 64/x

So,

Y = 64/8

Y = 8.

X = 8, y = 8

Thank you!

3 0
2 years ago
Someone help pleaseeee
Aleks [24]

2a + 8a simplified is 10a

3 0
3 years ago
Please I need an example of this to help me out…<br> (3.76 x 10^5)+(7.44 x 10^5)
Alika [10]

Answer:

1.12 x 10^6 or 1,120,000

Step-by-step explanation:

You work out the first part which would be (3.76 x 10^5) or 376,000.

Then you work out the second part which would be (7.44 x 10^5) or 744,000.

Then you add them together and move the decimal over to where the number is less than ten but greater than 0 so it would be like this:

1.120000

But just cut all the zeros so it would be like this:

1.12

And how ever many times you move the decimal over is the number you put beside the ten by the way. it should look a little like this by the time you are done:

1.12 x 10^6

3 0
3 years ago
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