Answer:
1) let the larger number be x and the smaller is y
2) 9x + 2y = 6
3x - y = 7
3) 9x+2y=6 and 9x -3y = 21
5y = -15
y= -3
5)
3x=4
x=4/3
Answer:
40, 60, 80
Step-by-step explanation:
The sum of angles in all triangles is 180 degrees (assuming you are talking about Euclidean geometry). If 2:3:4 is the ratio then
2x + 3x + 4x = 180
9x = 180
x = 20
Now that we now what x is, we can find the respective angles by plugging the value of x in. The angles are 40, 60, and 80 respectively.
Answer:
23)
P = 20x^2 + 14xy^2
A = 70x^3y^2
24)
P = 8a^3b + 4ab
A = 4a^4b^2
25)
A = 18x^3y
Step-by-step explanation:
23)
P = 2(10x^2 + 7xy^2)
P = 20x^2 + 14xy^2
A = 10x^2 x 7xy^2
A = 70x^3y^2
24)
P = 2a^3b + 6a^3b + 4ab
P = 8a^3b + 4ab
A = 1/2(2a^3b)(4ab)
A = 4 a^4 b^2
25)
A = 1/2(4xy+8xy)(3x^2)
A = 1/2(12xy)(3x^2)
A = 18x^3y
Answer:
$130.7086
Step-by-step explanation:
List price of phone answering system = $99.86
Handset cord = $8.95
Telephone wire = 45 cent/foot ; length = 50 feet
Rebate on phone system = $5
Store coupon =$1 of each accessory
Sales tax = 6% on final price
Price before coupon = (99.86 + 8.95 + (50*0.45)) =$131. 31
Number of accessories = 3
Total coupon = $5 + ($1 * 3) = $8
Price after coupon = final price : $131.31 - $8 = $123.31
Sales tax = 0.06 * $123.31 = $7.3986
Amount paid = $123.31 + $7.3986 = $130.7086
