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My name is Ann [436]
3 years ago
7

the sum of three numbers is 131. The second of three numbers is seven more than twice the first. The third number is 12 less tha

n first . What equation can be used to solve the problem
Mathematics
1 answer:
spin [16.1K]3 years ago
3 0
No. 1 = x
No. 2 = 2x+7
No. 3 = x-12

Answer:

x+(2x+7)+(x-12) = 131

From there you solve to get the numbers:

34, 75 and 22
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Simplify the expression. 35(12)(5)
Furkat [3]

Answer:

the answer is 2100

Step-by-step explanation:

7 0
3 years ago
100 points please help 8th grade math
Irina-Kira [14]

Answer:B? l hope is B l hope helps

Step-by-step explanation:

if not help then l will answer other problem from you l hope is right

7 0
3 years ago
Write an equation for a quadratic function that has x intercepts (-3, 0) and (5, 0)
Blizzard [7]

Answer:

One possible equation is f(x) = (x + 3)\, (x - 5), which is equivalent to f(x) = x^{2} - 2\, x - 15.

Step-by-step explanation:

The factor theorem states that if x = x_{0}  (where x_{0} is a constant) is a root of a function, (x - x_{0}) would be a factor of that function.

The question states that (-3,\, 0) and (5,\, 0) are x-intercepts of this function. In other words, x = -3 and x = 5 would both set the value of this quadratic function to 0. Thus, x = -3\! and x = 5\! would be two roots of this function.

By the factor theorem, (x - (-3)) and (x - 5) would be two factors of this function.

Because the function in this question is quadratic, (x - (-3)) and (x - 5) would be the only two factors of this function. In other words, for some constant a (a \ne 0):

f(x) = a\, (x - (-3))\, (x - 5).

Simplify to obtain:

f(x) = a\, (x + 3)\, (x - 5).

Expand this expression to obtain:

f(x) = a\, (x^{2} - 2\, x - 15).

(Quadratic functions are polynomials of degree two. If this function has any factor other than (x - (-3)) and (x - 5), expanding the expression would give a polynomial of degree at least three- not quadratic.)

Every non-zero value of a corresponds to a distinct quadratic function with x-intercepts (-3,\, 0) and (5,\, 0). For example, with a = 1:

f(x) = (x + 3)\, (x - 5), or equivalently,

f(x) = x^{2} - 2\, x - 15.

6 0
2 years ago
Find the number to sides of a regular polygon if the sum of the interior angles are 7560
Stels [109]
Use S=(n-2)180 
S is the sum and N is the number of sides
If you know that the sum is 7560 then plug that in for S
7560=(n-2)180
Then solve for n
7560=180n-360 (note I used distributive property)
7560+360=180n
7920=180n
7920/180=n
n=44 sides
I hope this helps :)
6 0
3 years ago
If 1=36, 2=38, 3=39, what does 4 equal to? kindly explain
timama [110]
Answer: 4=40 ! Its a pattern
8 0
3 years ago
Read 2 more answers
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