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madam [21]
3 years ago
14

Only answer if you know pls​

Mathematics
1 answer:
STALIN [3.7K]3 years ago
8 0

Answer:

<h2>m∠A = 115° and m∠C = 50°</h2>

Step-by-step explanation:

We know: the sum of the measures of triangle angles is 180°.

Therefore we have the equation:

(4x-13)+15+(x+18)=180             <em>combine like terms</em>

(4x+x)+(-13+15+18)=180

5x+20=180               <em>subtract 20 from both sides</em>

5x=160            <em>divide both sides by 5</em>

x=32

m\angle A=(4x-13)^o\\\\m\angle C=(x+18)^o

Substitute:

m\angle A=(4\cdot32-13)^o=(128-13)^o=115^o\\\\m\angle C=(32+18)^o=50^o

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Solve the following equation by completing the square. 1/4x^2+x+1/4=0
fenix001 [56]

Answer:

D. X=-2+sqrt(3) or -2-sqrt(3)

x_{1} =-2+\sqrt{3} \\x_{2} =-2-\sqrt{3}

Step-by-step explanation:

Quadratic Equation given:

$\frac{1}{4} x^2+x+\frac{1}{4}=0$

In order to get rid of the fractions, multiply both sides by 4.

$\frac{1}{4}x^2\cdot \:4+x\cdot \:4+\frac{1}{4}\cdot \:4=0\cdot \:4$

We get:

x^2+4x+1=0

x^2+4x+4-4+1=0

Completing the square:

(x+2)^2-4+1=0\\

(x+2)^2-3=0

(x+2)^2=3

x+2=\pm\sqrt{3}

x=-2\pm\sqrt{3}

x_{1} =-2+\sqrt{3} \\x_{2} =-2-\sqrt{3}

8 0
2 years ago
15q – 4r = 62<br> 5q + 8r = 86
KIM [24]

Answer:

q = 6; r = 7

Step-by-step explanation:

3 0
3 years ago
The Moores family paid $6 more for skate rentals than the Cotters did. Together the two families paid $30 for skate rentals. How
Mademuasel [1]
<span>Moores Family Paid = 6 dollars mores for skate rental than the cotters did.
30 dollars = the total amount they paid for skate rentals.
Let Family Moore have the variable X
Let the Family Cotters have the variable Y
=> x = y + 6
=> y = 30 – 6 / 2
First, let’s solve the Y
=> Y – 30 – 6 / 2
=> Y = 24 / 2
=> y = 12
Now, let’s solve for X
=> X = y + 6
=> x = 12 + 6
=> X = 18

</span>



8 0
2 years ago
21÷xy=? With x=-3 y=2​
Vsevolod [243]
Plug in the numbers so it will turn out as 21. Divided by 3(2) . You know that if 2 numbers are close by each other than you are going to multiply so 3 times 2 = 6 , then you do 21 divided by 6 = 3.5

The answer = 3.5
6 0
2 years ago
I need help :( :( :( :( :(
sertanlavr [38]
Ok. With what may I ask?
6 0
3 years ago
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