Exercises
1. The sum of both numbers of a number is 14. On having exchanged the numbers of the tens with that of the units, the number increases in 18. It finds the original number.

2. The sum of two numbers is 21 and his difference is 5. ¿Which are the numbers?

Please I am grateful for them to him very much indeed ...:)

Answers

Answer 1

Answer: a)
Note that there are only two numbers that correspond complete wording of question: 59 and 68
It is easy to verify that the number found number is 68:

Look:
6 + 8 = 14 and
86 - 68 = 18

b)
Now you can solve one system:

x + y = 21
x - y = 5

Add both equations:

2x = 26
x = 13

So: y = 8

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Use the gcf and the distributive property to express the sum as a product 20 35

Answers

common factor of 20= 1,2,4,5,10.......
common factor of 35=1,5,7.............
so here we find that 1 and 5 r the common factors
but the GCF of 20 and 35 is 5
so,
by using GCF the distributive property is : 5(4+7)

a ski shop has a markup rate of 50% find the selling price of skis that cost the store owner $300. tell me how you got the answer

Answers

if nthe shop has a mark up rate of 50% and they cost 300 to buy you multiply 300 by 50% convert 50% to decimal
so you do .5*300=150
then you add 150 to 300 which means that the shop sells the skis for 450 dollars.

Perpendicular lines form a 90° angle. True
or false?

Answers

Answer:

True

Step-by-step explanation:

Answer:

it really just depends

Step-by-step explanation:

W + 1200+209 = 2000This might seem easy but I seriously don’t know how to get to the answer

Answers

Answer:

591

Step-by-step explanation:

added the 2 in the equation and minused 2000 from that

The perimeter of a rectangle billboard is 60 feet and has a length 6 feet longer than its width. Find the dimensions of the billboard.

Answers

$x-width\nx+6-length\n\n2x+2(x+6)=60\n\n2x+2\cdot x+2\cdot6=60\n\n2x+2x+12=60\n\n4x+12=60\ \ \ \ /-12\n\n4x=48\ \ \ \ /:4\n\nx=12\ (ft.)\n\nx+6=12+6=18\ (ft.)\n\nAnswer:18ft.\ *\ 12ft.$