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myrzilka [38]
3 years ago
10

A triangle has a angle of x, 40 and 30 what is the angle of x

Mathematics
2 answers:
skad [1K]3 years ago
6 0

Answer:

x = 110

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180° , then

x + 40° + 30° = 180°

x + 70° = 180° ( subtract 70° from both sides )

x = 110°

kompoz [17]3 years ago
3 0

Sum of interior angles of a triangle = 180°

x+40+30= 180°

x+ 70=180

x= 180-70

x= 110°

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Squareroot(y-1) + 3 = y
jek_recluse [69]
Note:xy means x times y and x(y) means the same thing

so
first we get rid of square root then
make the equation equal to zero becaues if
xy=0 then x or/and y=0



squareroot(y-1)+3=y

isolate the squareroot
subtrac 3 from boht sides

squareroot(y-1)=y-3

square both sides (since they are equal, you should be able to square both sides and still make it true)

(squareroot(y-1))^2=(y-3)^2
(y-1)=(y-3)(y-3)
y-1=y^2-6y+9
subtrac y from both sides
-1=y^2-7y+9
add 1 to both sides
0=y^2-7y+10
find what two number multiply to make 10 and add to get -7
the answer is -2 and -5

0=(y-5)(y-2)
therfore
y-5=0
and/or
y-2=0

therefor
y=5 or/and 2 might work
let's try out 2
square root(2-1)+3=2
square root(1)+3=2
1+3=2
false
so 2 doesn't work



let's try 5
squareroot(5-1)+3=5
squareroot(4)+3=5
2+3=5
5=5
true

y=5
7 0
3 years ago
Write the equation of a line that is perpendicular to y=7x−2 and passes through the point (14,8).(1 point) y=7x−90 y=10x−17 y=−1
True [87]

Answer:

\huge\boxed{y=-\frac{1}{7}x+ 10}

Step-by-step explanation:

In order to find the equation of this line, we need to note two things.

  • A) The slope of two lines that are perpendicular will be opposite reciprocals (that is, multiplying them gets us -1.)
  • B) We can substitute a point inside an incomplete equation to try and find a missing value.

So first, let's find the opposite reciprocal of 7 which will be the slope to this equation.

  • <u>Reciprocal of 7:</u>    \frac{1}{7}
  • <u>Opposite of </u>\frac{1}{7}:    -\frac{1}{7}

So the slope of this line will be -\frac{1}{7}. The y-intercept will change, and we can substitute what we know into the equation y=mx+b.

y = -\frac{1}{7}x+b

Now, we can substitute a point on the graph (14, 8) into this equation to find b.

  • 8 = -\frac{1}{7} \cdot 14 + b
  • 8 = -\frac{14}{7} + b
  • 8 = -2 + b
  • b = 10

Now that we know the y-intercept, we can finish off our equation by plugging that in.

y = -\frac{1}{7}x + 10

Hope this helped!

7 0
3 years ago
Read 2 more answers
A quarter is 1/4 of a dollar. Victor has 32 quarters. how much money does he have
Vikentia [17]

Answer:

its actually a 1/4 of a dollar so it would be 8 dollars

Step-by-step explanation:

32 divided by 4 = 8

hope i helped

8 0
3 years ago
On a particular night, a baseball stadium sells 60% of its seats, and of those, 15% do not end up showing up to the game.Assumin
Lelechka [254]

Answer:

Step-by-step explanation:

so llets find what 15% of 60% really is,

0.15*0.60=0.09

0.09 AKA 9%

so since 9% of people didn't show up we can subtract 9% from 60%

so 60-9=51

51% of setas are taken

to find the percent of seats still empty, subtract 100 form 51

so

100-51=49

49% of seats are still empty

Hope this helsp!

8 0
3 years ago
How much money will the movie theater make if a birthday party of 12 kids each buys a box of candy and a soda but does not go se
Hunter-Best [27]

Answer:

$93

Step-by-step explanation:

12(3.75+4.00)

= 93

4 0
3 years ago
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