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Korvikt [17]
3 years ago
12

five times the difference of twice a number and three, decreased by the sum of the number and eight, equals thirteen

Mathematics
1 answer:
trapecia [35]3 years ago
7 0
5x(2y-3)-(y+8)=13 I believe this is correct
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Theresa bought three containers of tennis balls at $2.98 each. She had a coupon for $1 off. Her mom paid for half of the remaini
Rzqust [24]

Answer:

$3.97

Step-by-step explanation:

Three containers @$2.98 = 3 × 2.98 = $8.94

                                               Less $1 =   <u>-1.00 </u>

                                                                  7.94

Less 50% paid my mom = ½ × 7.94 =   <u>-3.97 </u>

                               Paid by Theresa =  $3.97

[(3 × 2.98) - 1] ÷ 2 = (8.94 - 1) ÷ 2 = 7.94 ÷ 2 = 3.97

6 0
3 years ago
The area of an 11-cm-wide rectangle is 242cm2. What is it's length
VladimirAG [237]
22 centimeters

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3 0
3 years ago
A ramp leading into a building makes a 15o angle with the ground. the end of the ramp is 10 feet from the base of the building.
Oksanka [162]
We are tasked to solved for the length of the ramp having an inclination of 15 degrees with the ground and 10 feet from the end of the ramp to the base of the building of the ground. Using trigonometric properties, we have a formula given an angle and the its opposite sides which is,
sin(Angle)=opposite/hypothenuse
hypothenuse would be the distance or the length of the ramp.
so we have,
sin(15)=10/hypothenuse
Cross-multiply, we have,
hypothenuse=10/sin(15)
using scientific calculator having a DEG mode,
hypothenuse=38.63703
Rounding of in nearest tenth we get,
hypothenuse=38.6 ft
Therefore, the ramp is 38.6 ft long
3 0
3 years ago
Keiko is putting money into a checking account. Let y represent the total amount of money in the account (in dollars). Let x rep
Kamila [148]

the starting amount would be the 550, because it doesn't have a variable assigned to it.

 change per week is 20 since it is being multiplied by the number of weeks

7 0
3 years ago
Simplify <br> ( 5w + 13 ) + ( 2w + 1)
Vadim26 [7]

Answer:

10w^2 + 24w + 13

Step-by-step explanation:

use Foil method

6 0
3 years ago
Read 2 more answers
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