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2 years ago

If the vertex of a parabola is (-7,-1) , what is the axis of symmetry

Mathematics

1 answer:

jekas [21]2 years ago

8 0

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PLZ help me fast 2 mins left

jek_recluse [69]

Answer:

$\sqrt{-5}=i\sqrt{5}$

$\sqrt{-25}=5i$

Step-by-step explanation:

i is an imaginary unit, this means

$i^2=-1$

Rewrite -5 as $5\cdot (-1)=5\cdot i^2,$

then

$\sqrt{-5}=\sqrt{5i^2}=\sqrt{5}\cdot \sqrt{i^2}=\sqrt{5}\cdot i=i\sqrt{5}$

Rewrite -25 as $-25=25\cdot (-1)=25\cdot i^2,$

then

$\sqrt{-25}=\sqrt{25\cdot i^2}=\sqrt{25}\cdot \sqrt{i^2}=5\cdot i=5i$

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2 years ago

45 POINTS IF ANSWER!!!<br> Find the value of X in the triangle shown below.

pochemuha

Answer:

The bacterium expels oxygen, making room for

hydrogen peroxide and carbon dioxide. These elements are then combined with solar energy to produce fuel.

Step-by-step explanation:

Thank my answer and mark me as brainist

8 0

2 years ago

Read 2 more answers

Help with 21 would be much appreciated.

umka2103 [35]

Answer:

$\large\boxed{x=2\sqrt{21}\ and\ y=4\sqrt3}$

Step-by-step explanation:

Look at the picture.

ΔADC and ΔCDB are similar. Therefore the sides are in proportion:

$\dfrac{AD}{CD}=\dfrac{CD}{DB}$

We have

$AD=14-8=6\\CD=y\\DB=8$

Substitute:

$\dfrac{6}{y}=\dfrac{y}{8}$ <em>cross multiply</em>

$y^2=(6)(8)$

$y^2=48\to y=\sqrt{48}\\\\y=\sqrt{16\cdot3}\\\\y=\sqrt{16}\ cdot\sqrt3\\\\\boxed{y=4\sqrt3}$

For x use the Pythagorean theorem:

$x^2=6^2+(4\sqrt3)^2\\\\x^2=36+48\\\\x^2=84\to x=\sqrt{84}\\\\x=\sqrt{4\cdot21}\\\\x=\sqrt4\cdot\sqrt{21}\\\\\boxed{x=2\sqrt{21}}$

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2 years ago

Helpppppp me with question 4 Thursday pleaseeeeeeeeeeeeeeee

Gennadij [26K]

If x is 0 then I think it would be the 3 to the second power and that is 9. Because 0 + 9 = 9. Correct me if I’m wrong!

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2 years ago

Organization Behaviour is a field of study backed by following for growing concern for people at workplace.

slega [8]

Answer:

All given option

Step-by-step explanation:

the answer is All given option hahahahajahahahahahahajaja

3 0

2 years ago