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Crazy boy [7]
3 years ago
9

Find two numbers whose sum is 78 and whose difference is 10

Mathematics
1 answer:
Neporo4naja [7]3 years ago
3 0
X+Y=78___1
X-Y=10____2
1+2
X+Y=78
X-Y=10
+_____
2X=88
X=44
Sub X=44 in 1
44+Y=78
Y=34
Therefore the numbers are 34,44
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Name:
n200080 [17]

Answer:

See below

Step-by-step explanation:

<u>Zeroes</u>

f(x)=2(x-1)(x+3)

0=2(x-1)(x+3)

0=(x-1)(x+3)

x=1 and x=-3

(1,0) and (-3,0)

<u>Axis of Symmetry</u>

f(x)=2(x-1)(x+3)

y=2(x-1)(x+3)

y=2(x^2+2x-3)

y+2(4)=2(x^2+2x-3+4)

y+8=2(x^2+2x+1)

y+8=2(x+1)^2

y=2(x+1)^2-8

y=a(x-h)^2+k

x=h

x=-1

<u>Vertex</u>

y=a(x-h)^2+k

y=2(x+1)^2-8

(h,k)\rightarrow(-1,-8)

<u>Y-intercept</u>

f(x)=2(x-1)(x+3)

f(0)=2(0-1)(0+3)

f(0)=2(-1)(3)

f(0)=-6

y=-6

(0,-6)

Please review the attached graph for a visual of these key features.

5 0
3 years ago
Yall its not 18 it is 15.5 i did the math and calculated it to find the anwser
madreJ [45]

Answer:

ok thx?

Step-by-step explanation:

3 0
3 years ago
What is the solution of the equation shown?<br> -1.2(3x - 3) = 4(3x + 0.9)
MariettaO [177]

Answer: x=0

Step-by-step explanation: -1.2(3x-3) = 4(3x+0.9)                                           -3.6x+3.6=12x+3.6                                                                                             -3.6x-12x+12x=12x+3.x+12x                                                                                   -15.6x+3.6-3.6=3.6-3.6                                                                                          -15.6x/-15.6=0/-15.6                                                                                           x=0                          

4 0
3 years ago
A track and field playing area is in the shape of a rectangle with semicircles at each end . The perimeter of the track is to be
MAVERICK [17]
We can let the radius of the semi circles be r and x can be the length of the rectangle.
The perimeter will be Perimeter = 2x + 2pr = 1200
The area of the rectangle is Area = x(2r)
 Once we solve the perimeter equation, you get x = 600.
Put this into the area equation and you get Area = (600 - pr)(2r)
The maximum then gives r = 95. 493 and area 57, 295.8
Dimensions

Height is twice the radius or 190.986. Find base use equation x = 600 - p(95.493) = 300.

This means dimensions are 300 by 190.986 
5 0
3 years ago
PLZ HELP IF WRONG ILL REPORT
dimulka [17.4K]
I HONESTLY WOULD THINK THIS COULD BE BIAS ONLY BECAUSE DIFFERENT OPINION ARE INCLUDED BUT AT THE SAME TIME BESTBUY NEVER SAID ANYTHING ABIUT THEM HATING BESTBUY
7 0
3 years ago
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