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Inga [223]
3 years ago
7

How do round a decimal of 2.25 into a whole number ??

Mathematics
1 answer:
Mama L [17]3 years ago
8 0

Answer:

<h3>2</h3>

Step-by-step explanation:

The whole number will be 2 because 2.25 is closer to 2 than 3 when we round to whole number

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Solve y=-3x² + 4.5x – 20<br> Use the Quadratic formula
statuscvo [17]

Answer:

x=0.75 \pm 2.47067i

Step-by-step explanation:

Quadratic Formula: x=\frac{-b \pm \sqrt{b^2-4ac} }{2a}

√-1 is imaginary number i

Step 1: Define

y = -3x² + 4.5x - 20

a = -3

b = 4.5

c = -20

Step 2: Substitute and Evaluate

x=\frac{-4.5 \pm \sqrt{4.5^2-4(-3)(-20)} }{2(-3)}

x=\frac{-4.5 \pm \sqrt{20.25-240} }{-6}

x=\frac{-4.5 \pm \sqrt{-219.75} }{-6}

x=\frac{-4.5 \pm \sqrt{219.75}(\sqrt{-1} ) }{-6}

x=\frac{-4.5 \pm i\sqrt{219.75} }{-6}

x=\frac{4.5 \pm i14.824 }{6}

x=0.75 \pm 2.47067i

7 0
3 years ago
Vector u has its initial point at (21,12) and its terminal point at (19,-8). Vector v has a direction opposite that of u, whose
agasfer [191]

Step-by-step explanation:

517÷4685568π√7%+66×74367

7 0
3 years ago
What are two ways that you can find the surface area of a prism
3241004551 [841]

Answer:


Step-by-step explanation:


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3 years ago
Please help me!!<br> 2(5– x)3 – 11=151
konstantin123 [22]

Answer:

x = -22

Step-by-step explanation:

2(5– x)3 – 11 = 151

(10 - 2x)3 - 11 = 151

30 - 6x = 162

-6x = 132

x = -22

5 0
3 years ago
Question:<br> 15-4+ (7 - 5)
GREYUIT [131]

Answer:

13

Step-by-step explanation:

15 - 4 + 7 - 5 = 13

Simply expand the brackets and subtract and add accordingly.

3 0
3 years ago
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