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3 years ago

First pirson to type 1 i will see if i can give brainlist but idk how bot i will try

Mathematics

1 answer:

amm18123 years ago

3 0

Answer:

Step-by-step explanation:

you asked to type 1

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HELPPPP PLZZZZ!!!!!!!!!!

hram777 [196]

Answer:

i can help just not with this

Step-by-step explanation:

did i help :D

6 0

3 years ago

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Estimate 815-281 to get the answer

Damm [24]

Answer:800-300

Step-by-step explanation:

since there is a 1 after the 8 it would go down to 800 and there is a 8 after the 2 so it would go up to 300

4 0

4 years ago

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Elina [12.6K]

answer- 18

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3 years ago

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I NEED HELP PLEASE!!<br> if Q=2.1R+5 find Q when R=5

marusya05 [52]

Answer:

If Q=2.1(R)+5, then it would be 2.1(5)+5=15.5 ?

Step-by-step explanation:

7 0

3 years ago

Solve the equation using the quadratic formula. Enter each solution in simplest form.

sergeinik [125]

For this case we have the following quadratic equation:

$x ^ 2-4x + 23 = 0$

The solutions will be given by:

$x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}$

Where:

$a = 1\\b = -4\\c = 23$

Substituting the values we have:

$x = \frac {- (- 4) \pm \sqrt {(- 4) ^ 2-4 (1) (23)}} {2 (1)}\\x = \frac {4 \pm \sqrt {16-92}} {2}\\x = \frac {4 \pm \sqrt {-76}} {2}\\x = \frac {4 \pm \sqrt {76i ^ 2}} {2}\\x = \frac {4 \pmi \sqrt {76}} {2}\\x = \frac {4 \pmi \sqrt {2 ^ 2 * 19}} {2}\\x = \frac {4 \pm2i \sqrt {19}} {2}\\x = 2 \pm i\sqrt {19}$

We have two roots:

$x_ {1} = 2-i \sqrt {19}\\x_ {2} = 2 + i \sqrt {19}$

ANswer:

$x_ {1} = 2-i\sqrt {19}\\x_ {2} = 2 + i\sqrt {19}$

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4 years ago