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Talja [164]
3 years ago
8

•225+225 = ?•5/25 = ?•78-8 = ?•13*1 = ?​

Mathematics
2 answers:
Karolina [17]3 years ago
5 0

ANSWER:

[i] 225 + 225 = 450.

[ii] 5/25 = 1/5.

[iii] 78 - 8 = 70.

[iv] 13 × 1 = 13.

Ratling [72]3 years ago
5 0

Step-by-step explanation:

hope it is helpful to you

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bulgar [2K]

Answer:

x=2+i\sqrt{11}

x=2-i\sqrt{11}

Step-by-step explanation:

we have

x^{2} =4x-15 -------> x^{2}-4x+15=0

we know that

The formula to solve a quadratic equation of the form ax^{2} +bx+c=0 is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

x^{2}-4x+15=0

so

a=1\\b=-4\\c=15

substitute in the formula

x=\frac{-(-4)(+/-)\sqrt{-4^{2}-4(1)(15)}} {2(1)}

x=\frac{4(+/-)\sqrt{16-60}} {2}

Remember that

i=\sqrt{-1}

x=\frac{4(+/-)\sqrt{-44}} {2}

x=\frac{4(+/-)2i\sqrt{11}} {2}

x=\frac{4(+)2i\sqrt{11}}{2}=2+i\sqrt{11}

x=\frac{4(-)2i\sqrt{11}}{2}=2-i\sqrt{11}

7 0
3 years ago
A roll of ribbon is used to tie 12 gifts which will be given to teachers on Teacher's
Wewaii [24]

Answer:

22.2m

Step-by-step explanation:

1 roll to 12 gifts

one gifts uses 1,85m of ribbon

1,85m is the length

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3 0
2 years ago
Please help !!!! Need before the next 20 min!!!
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8 0
3 years ago
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Inessa [10]

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Step-by-step explanation:

7 0
3 years ago
If A is (-2,6) and B is (4,-2), what is the midpoint of AB
sashaice [31]
Given two points:
A(x₁,y₁) and B(x₂,y₂) the midpoint would be:
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3 years ago
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