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3 years ago

WILL GIVE BRAINLIEST!!!! pls help

Mathematics

1 answer:

siniylev [52]3 years ago

7 0

Answer:

-5x+y=-22

Add -y to both sides.

-5x+y+(-y)=-22+(-y)

-5x=-y-22

Divide both sides by -5

-5x/-5=-y-22/-5

x=1/5y+22/5

which is your answer^

Step-by-step explanation:

-6x+5y=-15

Add -5y to both sides.

-6x+5y+(-5y)=-15+(-5y)

-6x=-5y-15

Divide both sides by -6

-6x/-6=-5y-15/-6

x=5/6y+5/2

which is the answer to the first set of questions.

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What is 26% of 50? plz help

galben [10]

Answer:

Step-by-step explanation:

50 multiplied by .26

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3 years ago

The fabric coast 7¢ per square inch she will only pay for the fabric used to cover the box, even if there is waste or extra. How

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3 years ago

The area of a right triangle is sixty square centimetres. Its base is one centimetre less than twice its height. If the base and

NemiM [27]

Answer:

5. None of the above

Step-by-step explanation:

We have this information:

A = 60 cm2

b = 2*h - 1

Let's find out b and h:

The equation of the are of a triangle is A = (b*h)/2, if we replace it with our information, we have

$60 = ((2*h - 1) * h)/2\\ 120 = 2*h^2 - h\\ 0 = 2*h^2 - h - 120$

Let's find h with the quadratic formula:

$\fbox {Quadratic formula:} \frac{-b\pm\sqrt{b^2-4ac}}{2a}$

$h = \frac{-(-1)\pm\sqrt{(-1)^2-4*2*(-120)}}{2*2} = \frac{1\pm\sqrt{961}}{4} = \frac{1\pm\ 31}{4}$

h = 8 or h = -7.5

But h represents the height of the triangle, so it has to be a positive number, that's h = 8.

If we replace this in the equation we had for b, we have that b = 2*8 - 1 = 15.

Now we can calculate the hypotenuse with the Pythagorean equation

$\fbox {Pythagorean equation:}$ The square of the length of the hypotenuse (the side opposite the right angle) of a right triangle is equal to the sum of the squares of the two legs (the two sides that meet at a right angle).

The base and the height are our legs. We will use "H" for the hypotenuse

$H^2 = b^2 + h^2 = 15^2 + 8^2 = 289\\ H = \sqrt {289} = 17$

H = 17

If we decrease the base and the height by 2 centimeters, we have

b' = 15 - 2 = 13 and h' = 8 - 2 = 6

With this, let's calculate the new hypotenuse:

$H'^2 = b'^2 + h'^2 = 13^2 + 6^2 = 205\\ H' = \sqrt {205} \approx 14.3$

$H' \approx 14.3$

So, the hypotenuse decreases $H - H' \approx 17 - 14.3 = 2.7$

3 0

3 years ago

Write an exponential function in the form of y=ab^x passing through the points (0,6) and (2,96)

taurus [48]

Here you have an equation with two unknown constants, a and b, plus 2 sets of points through which the graph goes.

Second point: 96 = a(b)^2
First point: 6 = a(b)^0 Then a = 6.

With a = 6, we can now write: 96 = 6b^2. Then b^2 = 16, and b=4.

Then y =6(4)^x (answer)

3 0

3 years ago

How do you solve this equation step-by-step? (below) 4a + 8 - 2a - 3 = 45

Rashid [163]

Answer:

a=20

Step-by-step explanation:

4a+8-2a-3=45

-8 on both sides

4a-2a-3=37

+3 on both sides

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5 0

3 years ago

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