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3 years ago

HELP i need the answers to these! explain if possible:)

Mathematics

1 answer:

IrinaVladis [17]3 years ago

5 0

so one: the middle Angles are all 90 degrees triangles equal 180, the angle opposite of "x" is equal to 34 so 180-90-34=x

two: both angles are equal set it up like an equation and solve for n

three: the corner angle of the right triangle is equal to 61 as well again do 180-(61×2)=x

4: do this equation (<ktu)2+ x = 180 then solve for x

5: not exactly.sure what its asking

hope this helps

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I really need help with this

zysi [14]

Answer:

Our system of equations is:

y+2x+1=0
4y-4x²-12x = -7

We are looking for x

Let's express y using x

y+2x+1=0
y= -2x-1

Replace x in the second equation with the result

4y-4x²-12x = -7
4(-2x-1)-4x²-12x = -7
-8x-4-4x²-12x = -7
-8x-4x²-12x = -7+4
-4x²-20x = -3
-4x²-20x+3 = 0 multiply by -1 to get rid of the - signs with x
4x²+20x-3=0

4x²+20x+3=0 is a quadratic equation

Let Δ be our discriminant

a= 4
b= 20
c= -3

Δ= 20²-4*4*(-3)

Δ=448 > 0 so we have two solutions for x

let x and x' be the solutions

x = $\frac{-20-\sqrt{448} }{8}$ = -5.145 ≈ -5.15
x'= $\frac{-20+\sqrt{448} }{8}$ = 0.145≈ 0.15

so the solutions are:

-5.15 and 0.15

7 0

3 years ago

Helppp<br> True or false: f(x) represents a function.

Nadusha1986 [10]

I think false because there can’t be a lot of “y” for one “x”

7 0

3 years ago

Working alone at its constant rate, pump X pumped out ¼ of the water in a tank in 2 hours. Then pumps Y and Z started working an

madam [21]

Answer:

The correct option is B) 12.

Step-by-step explanation:

Consider the provided information.

Working alone at its constant rate, pump X pumped out ¼ of the water in a tank in 2 hours.

As we know: $rate =\dfrac{ work}{time}$ ,

The rate of pump X is $\frac{\frac{1}{4}}{2} = \frac{1}{8}$

$\frac{1}{4}$ of the water is pumped out of the tank, that means only $\frac{3}{4}$ is left to be pumped out.

All 3 pumps pumped out the remaining $\frac{3}{4}$ of the water out in 3 hours.

The combined rate of all three pumps is: $\frac{\frac{3}{4}}{3} = \frac{1}{4}$

Pump Y, working alone at its constant rate, would have taken 18 hours to pump out the rest of the water.

The rate of pump Y = $\frac{\frac{3}{4}}{18} = \frac{1}{24}$

Let z is the time taken by pump Z, then the rate of pump Z is $\frac{1}{z}$ .

Therefore,

$\dfrac{1}{8}+\dfrac{1}{24}+\dfrac{1}{z}=\dfrac{1}{4}$

Multiplying both sides by 24 z.

$3z + z + 24 = 6z\\24 = 2z\\12 = z$

Hence, the correct option is B) 12.

5 0

3 years ago

4 tenths = 3 tenths + what hundredths

GREYUIT [131]

Answer:

0.10 or 0.1 hundredths

4 0

2 years ago

Best answer = brainliest

Mice21 [21]

Answer:

um i think its C .

Step-by-step explanation:

3 0

3 years ago