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stiv31 [10]
3 years ago
12

Find the value of a2 + 3b , when a = -2 and b = 5​

Mathematics
2 answers:
Sloan [31]3 years ago
5 0

\huge\mathfrak {Answer}

Value of

a = -2 and

b = 5

=》a2 + 3b

=》2 × 2 + 3 × 5

=》4 + 14

=》18

Thanks

zimovet [89]3 years ago
5 0

{\huge {\mathfrak {\orange {Answer :}}}}

We have, a = ( - 2) and b = 5

So, a^2 + 3b

= ( - 2)^2 + 3 * 5

= 4 + 15

= 19

➡️ 19 is your answer

That's it..

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Serjik [45]

Given equation:

(3x-4i)(7x-8)(3x+4i)=0

i.e., 3x-4i=0       and       7x-8=0       and       3x+4i=0

i.e., 3x=4i       and       7x=8       and       3x=-4i

i.e., x=\frac{4i}{3}       and       x=\frac{8}{7}       and       x=-\frac{4i}{3}

Therefore, the given equation has a real root i.e., x=\frac{8}{7}

and two complex conjugate roots i.e., x=\frac{4i}{3} and x=-\frac{4i}{3}

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4 0
3 years ago
What is the answer to this inequality question 2(4x+1)<3(2x-3)
Nikitich [7]

Answer:

x < -7

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2(4x + 1) < 3(2x - 3)

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8x + 8 < 6x - 6

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8x + 8 < 6x - 6

- 6x       -6x

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

2x + 8 < - 6

      -8    -8

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

2x < -14

Divide on Both Sides:

2x < -14

---     ---

2        2

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8 0
3 years ago
You have inherited a large collection of audio compact discs and decide to purchase a HiFi system to play them. At the retailer
leva [86]

Answer:

24

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So, the total number of different HiFi systems are available to purchase from this retailer is 4 × 3 × 2 = 24 .

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3 0
3 years ago
Three brothers, Justin, Jared, and Jonathan decided to buy a present for their mom's birthday. Justin gave decided to spend 1/4
iVinArrow [24]
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Jonathan's was different, as he invested 2/5. 11 divided by 2 is 5.5, in which 5.5*11 would equal 27.50.
The rest was simply their denominator times $11.
Jared had $33 dollars before the investment, and Justin has $44.
7 0
3 years ago
f a rectangle has a perimeter of 70, a length of x and a width of x - 9, find the value of the length of the rectangle.
trasher [3.6K]

( x + (x  -  9))  \times 2 = 70 \\( 2x - 9) \times2= 70 \\ 4x - 18 = 70 \\ 4x = 70 + 18 = 88
x =  \frac{88}{4}  = 22
the length is 22


and the width is
22-9=17





good luck
3 0
3 years ago
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