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2 years ago

Help I don’t understand this

Mathematics

1 answer:

Ganezh [65]2 years ago

5 0

Answer:

Step-by-step explanation:

they are opposite angles, so we put them equal to each other.

25.

6a+10= 130

6a=120 a=20 so now we plug it in 6(20) +10= 130

26. 4a-4=2a+30

2a=34 a=17 sso now we plug in 4(17)-4= 64 2(17)+30= 64

27. 6y+1=4y+9 2x-5=x+7

2y=8 x=2

y=4

now plug in 6(4)+1=25 4(4)+9=25 2(2)-5= -1 (2)+7=9

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Pls help solve this...No hacker links

Cerrena [4.2K]

Answer:

x=13

Step-by-step explanation:

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1 year ago

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2 years ago

What is the factored form of the expression?<br><br> d^2 = 36d + 324

Veseljchak [2.6K]

Answer:

$(x-43.45)(x+7.45)=0$

Step-by-step explanation:

We have the quadratic equation $d^{2}=36d+324$ i.e. $d^{2}-36d-324=0$

As, the roots of the quadratic equation $ax^{2}+bx+c=0$ are given by $x=\frac{-b\pm \sqrt{b^{2}-4ac}}{2a}$ .

So, from the given equation, we have,

a = 1, b = -36 , c = -324.

Substituting the values in $x=\frac{-b\pm \sqrt{b^{2}-4ac}}{2a}$ , we get,

$x=\frac{36\pm \sqrt{(-36)^{2}-4\times 1\times (-324)}}{2\times 1}$

i.e. $x=\frac{36\pm \sqrt{1296+1296}}{2}$

i.e. $x=\frac{36\pm \sqrt{2592}}{2}$

i.e. $x=\frac{36\pm 50.9}{2}$

i.e. $x=\frac{36+50.9}{2}$ and $x=\frac{36-50.9}{2}$

i.e. $x=\frac{86.9}{2}$ and $x=\frac{-14.9}{2}$

i.e. x = 43.45 and x = -7.45

Thus, the roots of the equation are 43.45 and -7.45.

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2 years ago

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faust18 [17]

Answer:

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Step-by-step explanation:

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