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3 years ago

I srsly need help this answer is not right and idk which one is

Mathematics

1 answer:

Zanzabum3 years ago

8 0

I'm not to well with this but try using photo math also they will show you exactly how to solve it

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What are the zeros of , where <br><br> ? help please need some help someone help please

Crank

${ \boxed{\boxed{\begin{array}{cc} \maltese \bf \: given \\ \\ \rm \: f(x) = ( {x}^{2} + 16)( {x}^{2} - 9) \\ \\ \bf \: for \: zeroes \\ \\ \pink{ \boxed{\boxed{\begin{array}{c | c} \bf \: {x}^{2} + 16 = 0 & \bf \: {x}^{2} - 9 = 0 \\ \\ = > {x}^{2} = - 16& {x}^{2} = 9 \\ \\ = > x = \pm \sqrt{ - 16} &x = \pm \: \sqrt{9} \\ \\ = > x = \pm \sqrt{ {i}^{2} {4}^{2} } &x = \pm \: \sqrt{ {3}^{2} } \\ \\ = > x = \pm \: 4i&x = \pm3 \end{array}}}} \\ \\ \rm \: x = \pm3 \: and \pm \: 4i\end{array}}}}$

Option A is the correct answer

4 0

3 years ago

The Sun hits a 30 foot flagpole at a 60° angle and casts an unobstructed 52 foot shadow. If a building is built 32 feet away, wh

aivan3 [116]

Answer: 11.5 ft

Step-by-step explanation:

The length of the shadow of the building = length of the shadow - distance of the building

= 52 - 32

= 20

Let the height the shadow strike the side of the building be h

then by similar shape rule

h / 20 = 30 / 52

52h = 30 x 20

52h = 600

h = 600/52

h = 11.53846154

h ≈ 11.5

3 0

3 years ago

2x^2+2y^2+6x-8y+12=0

lord [1]

Answer:

see explanation

Step-by-step explanation:

The equation of a circle in general form is

x² + y² + 2gx + 2fy + c = 0

with centre = (- g, - f) and radius = $\sqrt{g^2+f^2-c}$

Given

2x² + 2y² + 6x - 8y + 12 = 0 ← divide through by 2

x² + y² + 3x - 4y + 6 = 0 ← in general form

Compare like terms

2g = 3 ⇒ g = $\frac{3}{2}$

2f = - 4 ⇒ f = - 2 and c = 6, thus

centre = ( - $\frac{3}{2}$ , 2 ) and

radius = $\sqrt{(3/2)^2+(-2)^2-6}$

= $\sqrt{\frac{9}{4}+4-6 }$ = $\sqrt{\frac{1}{4} }$ = $\frac{1}{2}$

6 0

3 years ago

(x^2+5)=7 and (x^2+5)k=21, what is the value of k?

Roman55 [17]

Step-by-step explanation:

${x}^{2} + 5 = 7 \\ {x}^{2} = 7 - 5 \\ {x}^{2} = 2 \\ \\( {x}^{2} + 5)k = 21 \\ (2 + 5)k = 21 \\ (7)k = 21 \\ 7k = 21 \\ \frac{7k}{7} = \frac{21}{7} \\ k = 3$

8 0

3 years ago

A 4-ounce bottle of medicine contains 20 doses are in 13-ounce bottle of the same medicine

Ratling [72]

There would be 65 doses in a 13 ounce bottle.

7 0

3 years ago