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2 years ago

Multiplying using arrays(with factors of ten) 10×25=

1 answer:

Crank2 years ago

6 0

Whenever multiplying by 10 you just add a zero
so 10+10=20 and is equal to 10x2=20 see it just added a zero
so 10x25=250

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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

Calculator

AnnZ [28]

It is 20 Square feet

7 0

2 years ago

The question is number 16

stellarik [79]

18×7+5 is your answer. The answer for the problem is 18×7=126.

126+5=131.

3 0

3 years ago

For The Night (feat. Classe

jeka94

The scale for the model length of the fuselage obtained by taking the ratio of the model length and the actual length is 0.125

Actual Length of fuselage = 170 feets

Length of fuselage on model = 21.25

<u>To obtain the scale of the model, we take the ratio of the model length and the actual length</u> :

Model length / Actual length

21.25 feets / 170 feets = 0.125

Therefore, the scale for the model length of the fuselage is 0.125

Learn more :brainly.com/question/18796573

3 0

2 years ago

Need help with my math homework 3x +2y = 8

professor190 [17]

3x=8-2y

x=(8-2y)/3

3(8-2y)+2y=8

24-6y+2y=8

-4y=-16

y=4

3x+2(4)=8

3x+8=8

3x=0

x=0

3(0)+2(4)=8

x=0,y=4

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2 years ago