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Mashutka [201]
3 years ago
9

Find the zeros of: f(x) = 3x2 - 6x - 5

Mathematics
1 answer:
katrin [286]3 years ago
6 0
Use the quadratic formula to get x = (3 - 2*sqrt(6))/3 or x = (3 + 2*sqrt(6))/3
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Banu will build a fence around a rectangular
Solnce55 [7]

Answer:

A

Step-by-step explanation:

Dimension of the rectangular fence:

Length = 30 ft

Width = 25 ft

Perimeter of the rectangular fence = 2(L + W)

= 2(30 + 25) = 2(55)

Perimeter = 110 ft

Fencing cost per foot = $4.05

Fencing cost for 110 ft = 110 × 4.05 = $445.50

6 0
3 years ago
1. Use the quadratic, x? + 18x = 25 to answer the following questions.
makvit [3.9K]

Answer:

FIRST PROBLEM:

Exact Form:

x  =  25 /19

Decimal Form:

x =  1.31578947

Mixed Number Form:

x  =  1  6 /19

SECOND PROBLEM

Exact Form:

x  =  − 9  +  √ 106 ,  − 9  − √ 106

Decimal Form: x  =  1.29563014 ,  − 19.29563014

Step-by-step explanation:

5 0
3 years ago
4x + 5 - 2x + 1 = 2x - 5
lakkis [162]
4x+5-2x+1=2x-5
(4x-2x)+(5+1)=2x-5
2x+6=2x-5
2x=2x-11
2x-2x=-11
0=-11 no solution 
6 0
3 years ago
Help please!! <br> and Thank you!!<br> Find the surface area.
o-na [289]

Answer:

2411.52 mm²

Step-by-step explanation:

40^{2} =32^2+d^2

→ d^2= 1600-1024

→= 576

→ d= 24      so, (radius=12

Total~ surface ~ area= (2\pi r)*height

→ (2*3.14*12*82)

= 2411.52 mm^2

<u>-------------------------------</u>

<u>hope it helps...</u>

<u>have a great day!!</u>

6 0
3 years ago
Read 2 more answers
Please help with these math questions (Please don't answer if you don't know all of them)
lions [1.4K]
1.
volume of cone=(1/3)hpir^2
h=6
r=9
v=(1/3)6pi9^2
v=2pi81
v=162pi
3.14=pi for problem
162 times 3.14=508.68
answer is D




2. 2=r, 24=h
v=(1/3)24pi2^2
v=8pi4
v=32pi

answer is D



3. 10=h
4=r
v=(1/3)10pi4^2
v=(1/3)10pi16
v=(1/3)160pi
v=(160/3)pi

answer is C


4. 9=h
3=r
v=(1/3)9pi3^3
v=3pi9
v=27pi
pi=3.14
v=84.78
84.8 is answer


5. d/2=r12/2=6=r
r=6
h=12
v=(1/3)12pi6^2
v=4pi26
v=144pi
pi=3.14
v=425.16
v=425.2
answer is 425.2


ANSWERS

1. D
2. D
3. C
4.  84.8
5.  425.6
3 0
4 years ago
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