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4 years ago

:))) help por favor

Mathematics

1 answer:

miskamm [114]4 years ago

3 0

1 and 5 are equal, 1 and 8 are equal, 5 and 8 are equal
So if 1+5=100 and they're equal divide by 2: 100/2=50. So if 1 and 5 equals 50, then 8 also =50 :)

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If a system of linear equations has infinitely many solutions, what does this mean about the two lines?

Alex787 [66]

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3 years ago

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A rectangle with dimensions of 3 units by 7 units is enlarged by a scale factor of 1.1. By what percent does it’s area increase?

Ratling [72]

Answer:

$21\%$

Step-by-step explanation:

Original dimensions of the rectangle

$l=7\ \text{units}$

$w=3\ \text{units}$

Area of the rectangle

$A=7\times 3=21\ \text{units}^2$

Scale factor = 1.1

New dimensions

$l'=7\times 1.1=7.7\ \text{units}$

$w'=3\times 1.1=3.3\ \text{units}$

The new area of the rectangle

$A'=7.7\times 3.3=25.41\ \text{units}^2$

Percentage change is given by

$\dfrac{A'-A}{A}\times 100\\ =\dfrac{25.41-21}{21}\times 100=21\%$

The percentage by which the area of the rectangle increases is $21\%$ .

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3 years ago

In the right triangle below, tanA = 0.45. What is the approximate length of AB?

garik1379 [7]

In the right triangle ABC wherein AB is the hypotenuse, BC is the opposite and CA is the adjacent tanA=0.45. The approximate length of AB which is the hypotenuse is 22, Opposite (BC) is 9 and Adjacent (CA) is 20. You need to use pythagorean formula in getting the length of AB.

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4 years ago

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Can anyone help me with this pleaseeee :(

vovikov84 [41]

Alternate angles are equal so x-5=60
x=65

6 0

3 years ago

If f(x) = -1x + 1and g(x) = x4, what is (f º g)(x)?

Scilla [17]

Answer:

(f º g) = $-x^4+1$

Step-by-step explanation:

So it's important to note that the notation: "(f º g)" isn't f(x) * g(x), it's a composite function, where you essentially have two functions, with one of the functions being the argument of one of the functions.

This means we can plug in the function g(x) as x into the function f. So let's do that

Original Function:

f(x) = -1x + 1

Plug in x^4 (this is the value of g(x)) as x into the function

f(g(x)) = $-(x^4)+1$

Distribute the negative sign

f(g(x)) = $-x^4+1$

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2 years ago