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Sholpan [36]
4 years ago
7

Given: ∠AOC and ∠BOC are complementary. m∠AOC=m∠BOC+30°. Find: m∠AOC and m∠BOC

Mathematics
1 answer:
likoan [24]4 years ago
3 0

Answer:

Statement Reason

1. m∠AOC+m∠COB= 90° 1. complementary angles

2. m∠30° + BOC+m∠BOC=90° 2. Substitution

3. m∠BOC = 30° 3. Algebra

4. m∠AOC = 60° 4. Algebra

I think I got it

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What multiplies to -29 and adds to 1
Margarita [4]
First set up equation
x times y=xy

so
xy=-29
and
x+y=1
subtract x from both sides
y=1-x
subsitute 1-x for y in first equation
x(1-x)=-29
distribute
x-x^2=-29
add x^2 to both sides
x=-29+x^2
subtract x from both sides
0=x^2-x-29
so we can use the quadratic formula to solve for x if the equation=0 and it is in ax^2+bx+c form so

if
ax+bx+c=0 then x=\frac{ -b+/-\sqrt{b^2-4ac} }{2a} that means x=\frac{ -b-\sqrt{b^2-4ac} }{2a} or x=\frac{ -b-\sqrt{b^2-4ac} }{2a} so


x^2-x-29
a=1
b=-1
c=-29
\frac{ -(-1)-\sqrt{-1^2-4(1)(-29)} }{2(1)}=\frac{ +1-\sqrt{1^2-(-116)} }{2(1)}=\frac{ +1-\sqrt{1^2+116} }{2}=\frac{ +1-\sqrt{117} }{2}= \frac{1-10.816653826392}{2} = [tex] \frac{-9.816653826392}{2}= -4.908326913196



the second number is
\frac{ -(-1)+\sqrt{-1^2-4(1)(-29)} }{2(1)}=\frac{ +1+\sqrt{1^2+(-116)} }{2(1)}= \frac{1+10.816653826392}{2} = \frac{ +1+\sqrt{117} }{2}=  \frac{10.816653826392}{2}=5.908326913196


the two numbers are
5.908326913196 and
-4.908326913196


7 0
3 years ago
Paige and her family went to the movies. They bought 4 tickets and paid $12 for popcorn. They spent $40. How much did each ticke
Scorpion4ik [409]

Answer:

Cost of tickets: $7. Equation: 40 = 4x + 12.

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Enteroliths are calcifications that form in the gut of a horse. The stones can cause considerable morbidity and mortality. A stu
juin [17]

Answer:

A. mean=14.29

median=16

B. IQR=10

C.   option 3

D. 5.91

Step-by-step explanation:

mean=sum of values/number of values=10+20+4+13+21+16+16/7=14.29

median is achieved by arranging data in increasing order and then calculating the middle value

4 10 13 16 16 20 21

The mid value is 16 so the median=16

IQR=interquartile range=3rd quartile-1st quartile=Q3-Q1=20-10=10

As n/4=7/4 is not an integer so

Q1=(n/4+1)value=(7/4+1)=2.75=2nd value=10

Q3=(3n/4+1)value=6.25=6th value=20

Standard deviation=s=sqrt(∑(x-xbar)²/n-1)=sqrt(209.43/6)=5.91

7 0
3 years ago
3. The population of a country increases by 2% every year. The current
Katen [24]

Answer:

A=P(1+

100

R

)

n

A=10000(1+0.1)

3

=13310

Step-by-step explanation:

please mark me as the brainliest answer and please follow me

7 0
3 years ago
Can someone plz help me on this problem.....
Brut [27]

Answer:

choice 1) 2-4y

Step-by-step explanation:

from the answers available, you are looking for the expression for x to substitute into the first equation.

The second equation is: x+4y = 2

To convert x+4y = 2

subtract 4y from both sides of the equation:

x+4y-4y = 2-4y

simplified:

x = 2-4y

7 0
3 years ago
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