Answer:
The value of x is 4 and y is (-9)
Step-by-step explanation:
<h3><u>Given</u>;</h3>
<h3><u>To </u><u>Find</u>;</h3>
- Value of x
- Value of y
- By Elimination Method
Now, Name the equation
x + 2y = -14 ...(1)
x – y = 13 ...(2)
Now,
x + 2y = -14
x – y = 13
<u>– + –</u>
3y = -27
y = -9
Now, put the value of y in equation 2
x – y = 13
x – (-9) = 13
x + 9 = 13
x = 4
Thus, The value of x is 4 and y is (-9)
<h3>
<u>For </u><u>Verification</u>;</h3>
x + 2y = -14
4 + 2(-9) = -14
4 – 18 = -14
-14 = -14
x – y = 13
4 – (-9) = 13
4 + 9 = 13
13 = 13
Hence, L.H.S = R.H.S
<u>-TheUnknownScientist</u><u> 72</u>
2x^2+2x-40=0
2x^2+10x-8x-40=0
2x(x+5)-8(x+5)=0
(2x-8)(x+5)=0
2(x-4)(x+5)=0
x=-5 and 4
If you graph it, the zeros are just the values of x when the curve meets the x axis...
Answer:
t(n)= 0.2 * 2ⁿ
Step-by-step explanation:
Thickness= 0.2 millimeters
paper = 1
n= number of folds
The exponential function will be given by
t(n)= 0.2 * 2ⁿ
so if there's a single fold
t(1)= 0.2 * 2¹
t(1)= 0.4 mm
Now for 2 folds the thickness will be
t(2) = 0.2 *2 ²
t(2)= 0.2 *4
t(2) = 0.8mm
The exponential that represents this scenario is
t(n)= 0.2 * 2ⁿ
And for 3 folds the thickness will be
t(3) = 0.2 *2 ³
t(3)= 0.2 *8
t(3) = 1.6 mm
Let's assume
total number of cards =x
Pristine printing business cards:
for $0.10 each plus a setup charge of $15
so, we get equation for cost as
Printing Place business cards:
for $0.15 each with a setup charge of $10
so, we get equation for cost as
now, we are given
cost from both companies are same
so, we can set costs equal
now, we can solve for x
so,
number of business cards is 100.........Answer
