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3 years ago

Please help, pic attached!

Mathematics

1 answer:

RUDIKE [14]3 years ago

5 0

Answer:

(y − 9) (y − 2)

Step-by-step explanation:

Factor y^2 − 11y + 18 using the AC method.

(y − 9) (y − 2)

The “AC” method or factoring by grouping is a technique used to factor trinomials. A trinomial is a mathematical expression that consists of three terms.

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A spherical globe has a diameter of 10 inches. What is the approximate volume of the globe?

adelina 88 [10]

Answer:

523.33 in^3

Step-by-step explanation:

A sphere is a 3-dimensional version of a circle. An example of a sphere is a ball

Volume of a sphere = $\frac{4}{3}$ π $r^{3}$

Where

π = 3.14

r = radius

the diameter is the straight line that passes through the centre of a circle and touches the two edges of the circle.

A radius is half of the diameter

diameter = 2r

Radius = 10 in / 2 = 5 inches

$\frac{4}{3}$ × 3.14 × $5^{3}$ = 523.33 $in^{3}$

6 0

3 years ago

Which of these nets can not be used to create a cube?

8_murik_8 [283]

Answer:

Step-by-step explanation:

A net is formed when the surfaces of a given shape is laid flat on a horizontal plane. And on folding it with respect to its edges, the initial shape is reproduced with no distortion or loss.

From the given question, the net that would not produce a cube is that of option C.

7 0

2 years ago

An isosceles triangle has a perimeter of 18 cm. Find a function that models its area A in terms of the length of its base b.

IgorLugansk [536]

So.... notice the picture below

now, we know what the "height" or "altitude" is
now, we also know the perimeter is 18cm

so, k + k + b = 18
or 2k + b = 18
thus $\bf k=\cfrac{18-b}{2}$

so... one can say that $\bf \textit{area of a triangle}=A=\cfrac{1}{2}bh\qquad 
\begin{cases}
b=b
\\\\
h=\sqrt{k^2-\left( \frac{b}{2} \right)^2}
\\\\
h=\sqrt{k^2-\frac{b^2}{4}}\\
--------------\\
k=\frac{18-b}{2}\qquad thus\\
--------------\\
h=\sqrt{\left( \frac{18-b}{2} \right)^2-\frac{b^2}{4}}
\end{cases}\\\\
-----------------------------\\\\
A=\cfrac{1}{2}\cdot b\cdot \sqrt{\left( \frac{18-b}{2} \right)^2-\frac{b^2}{4}}$

and you can simplify it if you wish.. not sure you have to

7 0

2 years ago

What is the answer to this math problem 40+40x0+1=

Anna71 [15]

PEMDAS is
Parenthesis
Exponets
Multiply
Divide
Add
Subtract
therefore, you would do 40*0=0+40+1=41

5 0

3 years ago

Sonja [21]

Answer:

Volume: 1135.82 yd³

Surface Area: 657.12 yd²

Step-by-step explanation:

V = whl

12.2 · 9.8 · 9.5

1135.82

A = 2(wl + hl + hw)

2 · (12.2 · 9.5 + 9.8 · 9.5 + 9.8 · 12.2)

657.12

3 0

2 years ago