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il63 [147K]
3 years ago
11

WHAT IS X PLEASE HELP 50 POINTS

Mathematics
1 answer:
Iteru [2.4K]3 years ago
4 0

Answer:

x=52

Step-by-step explanation:

90+34

124

180 (sum of all interior angles) - 124

56

x+72+56=180 (straight line)

x+128=180

 -128  -128

x=52

*replace to verify*

52+72= 124

124+56= 180 (straight line)

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how do i find if the area is 1976 square inches, what are the radius, diameter, and circumference of the circle?
blagie [28]
Hello,
The area of the circle=
πr^2
or A=πr^2
1976=πr^2
Divided π or 3.14 from both side
1976/3.14=πr^2/π
629.3≈r^2
Square root from both side to get
r≈25.1 inches
d=2r
d=2(25.1)
d≈50.2 inches
C=πd
C=50.2π or C≈157.628 inches. Hope it help!
3 0
3 years ago
Which expression is equivalent to the given expression? -2x +8x -9 +4x +7x2 +2 A. B. C. D.
Crazy boy [7]

Answer:

The answer is "7x^2 +10x -7"

Step-by-step explanation:

Let the given value is:

\to \bold{-2x +8x -9 +4x +7x^2 +2}\\\\

Solving the given value:

\to7x^2 -2x +8x +4x-9 +2\\\\\to7x^2 +10x -7\\\\\to7x^2 +10x -7\\\\

6 0
3 years ago
What is the sum of an 8-term geometric series if the first term is 12 and the last term is -3,359,232?
olga nikolaevna [1]
We must find the common ratio first...

Since a(n)=ar^(n-1)

-3359232=12r^7

-279936=r^7

-279936^(1/7)=r

-6=r

So our geometric sequence is:

a(n)=12(-6)^(n-1)

And the sum of a geometric sequence is:

s(n)=a(1-r^n)/(1-r), since a=12, r=-6, and n=8 we have:

s(8)=12(1-(-6)^8)/(1--6)

s(8)=12(1-(-6)^8)/7

s(8)= -2,879,340
8 0
3 years ago
Multiply:(5x+4y) by(2x-3y)<br><br>no spam <br>step by step explaination ​
Dmitry_Shevchenko [17]

Step-by-step explanation:

5x(2x-3y)+4y(2x-3y)

10x-15y+8xy-12y²

hope this helps you

have a good day

5 0
2 years ago
Read 2 more answers
I’m pretty confused on this question. Anyone know the answers?
Afina-wow [57]

Answer:

see explanation

Step-by-step explanation:

the equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y-intercept )

• If m > 0, then the line slopes upwards from left to right ( increases )

• If m < 0, then the line slopes downwards from left to right ( decreases )

(a)

y + x = 3 ( subtract x from both sides )

y = - x + 3 ← in slope-intercept form

with m = - 1 ⇒ decreasing from left to right

(c)

y = 4x + 8 ← is in slope-intercept form

with m = 4 ⇒ increasing from left to right

the equation of a line in the form x = c represents a vertical line, where c is the value of the x-coordinates the line passes through

(b)

x - 5 = 0 ( add 5 to both sides )

x = 5 ← is a vertical line

the equation of a line in the form y = c represents a horizontal line, where c is the value of the y-coordinates the line passes through

(d)

\frac{y}{4} = - 6 ( multiply both sides by 4 )

y = - 24 ← is a horizontal line


3 0
3 years ago
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