2 years ago

2x + 5y = 13 -x + 4y = 13 solve by elimination

Mathematics

1 answer:

emmainna [20.7K]2 years ago

6 0

Answer:

i think x=-1 and y=3. ....

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Alex bought string for $125. Other materials for $18. What is the total cost to make 50 puppets?

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(125+18) 50 = $7,150

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2 years ago

A courier service company wishes to estimate the proportion of people in various states that will use its services. Suppose the

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1 year ago

The hypotenuese of an isosceles right triangle is 13 inches. The midpoints of its sides are connected to form an inscribed trian

Georgia [21]

Answer:

The Sum of the areas of theses triangles is 169/3.

Step-by-step explanation:

Consider the provided information.

The hypotenuse of an isosceles right triangle is 13 inches.

Therefore,

$x^2+x^2=169\\2x^2=169\\x=\frac{13}{\sqrt{2} }$

Then the area of isosceles right triangle will be: $A=\frac{1}{2} x^2$

Therefore the area is: $A=\frac{169}{4}$

It is given that sum of the area of these triangles if this process is continued infinitely.

We can find the sum of the area using infinite geometric series formula.

$S=\frac{a}{1-r}$

Substitute $a=\frac{169}{4} \ and\ r=\frac{1}{4}$ in above formula.

$S=\frac{\frac{169}{4}}{1-\frac{1}{4}}$

$S=\frac{\frac{169}{4}}{\frac{3}{4}}$

$S=\frac{169}{3}$

Hence, the Sum of the areas of theses triangles is 169/3.

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2 years ago

Simplify m(2+n-m)+3(3n+m^2-1)

mina [271]

Answer:2m^2+mn+2m+9n-3

Step-by-step explanation:

m(2+n-m)+3(3n+m^2-1)

open brackets

2m+mn-m^2+9n+3m^2-3

Collect like terms

3m^2-m^2+mn+2m+9n-3

2m^2+mn+2m+9n-3

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2 years ago

the library plans to add 1,000 books to its collection if the library can fit 15 books on each foot o shelving will the library

goblinko [34]

Answer: The anwser is 300

Step-by-step explanation:

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2 years ago