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3 years ago

PLEASE HELP ASAP 20 POINTS

Mathematics

2 answers:

alexgriva [62]3 years ago

7 0

Answer:

a ,c ,b

esa son creo pero nose

Arlecino [84]3 years ago

4 0

Answer:

1-C

2-C

Step-by-step explanation:

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The area of a rectangular fountain is (x^2 + 12x +20) feet squared. The width is (x + 2) feet.

n200080 [17]

Part A:
The total area = x² + 12x + 20 = (x+2)(x+10)
The width = x+2
∴ Length = area / width = [ (x+2)(x+10) ] / (x+2) = x+10

Part B: 
A 2-foot walkway is built around the fountain

∴ The width = (x+2) + 2 + 2 = x + 6
The length = (x+10) + 2 + 2 = x +14

Part C:
the total area covered by the fountain and walkway. 
= (x+6)(x+14)
= x² + 20 x + 84

See the attache figure for more explanation

5 0

4 years ago

In the diagram, AD=CD=CB and measure of angle A=40°. How many degrees are in angle DCB?

Ad libitum [116K]

Answer:

$20^{\circ}$

Step-by-step explanation:

Consider triangle ACD. This triangle is isosceles triangle, because AD = DC. Angles adjacent to the base AC are congruent abgles, so

$m\angle DAC=m\angle DCA=40^{\circ}$

The sum of the measures of all interiror angles in the triangle is always $180^{\circ},$ then

$m\angle DAC+m\angle DCA+m\angle ADC=180^{\circ}\\ \\40^{\circ}+40^{\circ}+m\angle ADC=180^{\circ}\\ \\m\angle ADC=180^{\circ}-40^{\circ}-40^{\circ}=100^{\circ}$

Angles ADC and BDC are supplementary angles (add up to $180^{\circ}$ ), then

$m\angle BDC=180^{\circ}-100^{\circ}=80^{\circ}$

Consider triangle BCD. This triangle is isosceles triangle because BC = DC. Angles adjacent to the base BD are congruent abgles, so

$m\angle BDC=m\angle DBC=80^{\circ}$

The sum of the measures of all interiror angles in the triangle is always $180^{\circ},$ then

$m\angle DBC+m\angle BDC+m\angle BCD=180^{\circ}\\ \\80^{\circ}+80^{\circ}+m\angle BCD=180^{\circ}\\ \\m\angle BCD=180^{\circ}-80^{\circ}-80^{\circ}=20^{\circ}$

6 0

3 years ago

Ben ordered a shipping contained so he could ship a model car to Europe.

juin [17]

Answer:

52 ft²

Step-by-step explanation:

Given :

Dimension : 2 by 3 by 4

Surface area of a rectangular prism :

2(wl + lh + wh)

Length = l

Width = w

Height = h

Surface Area = 2[(2*3)+(2*4)+(4*3)]

Surfave Area = 2[6+8+12]

Surface Area = 2(26)

Surface Area = 52 ft²

5 0

3 years ago

Solve for x in the equation x^2-4x-9=29? x=2+/- squareroot 42 x=2+/-squareroot 33 x=2+/-squareroot 34 x=4+/-squareroot 42

jeka57 [31]

For this case what we must do is to use the formula of the resolvent in the following way:
x = (- b +/- root (b ^ 2 - 4 * a * c)) / (2 * a)
Where,
a = 1
b = -4
c = -38
Substituting the values:
x = (- (- 4) +/- root ((- 4) ^ 2 - 4 * 1 * (- 38))) / (2 * 1)
x = (4 +/- root (168)) / 2
x = (2 +/- root (42))
Answer:
x = 2 +/- squareroot 42

3 0

3 years ago

What is the corresponding growth decay factor of the given annual rate of +200%

Alina [70]

2000 should be it I'm pretty sure

4 0

3 years ago