All categories

3 years ago

The sum of two numbers is 46 and the difference is 10 . What are the numbers?

Mathematics

2 answers:

valina [46]3 years ago

7 0

Answer: 28 and 18

Step-by-step explanation:

I used the guess and test strategy to find that:

28 - 10 = 18

28 + 18 = 46

spayn [35]3 years ago

3 0

X + y = 46
x - y = 10
*add these 2 equations

x + y + x - y = 46 + 10
2x = 56
x = 28

x - y = 10
28 - y = 10
*subtract 28 from both sudes
- y = 10 - 28
*multiply by -1
y = 28 - 10
y = 18

You might be interested in

How do I do this!?! 2s+5 greater than or equal to 49

aev [14]

<span>2s+5>= 49
Subtract 5 from both sides
2s>=44
Divide 2 on both sides
Final Answer: s>=22</span>

3 0

3 years ago

Heather makes $6.50 per hour. Every three months, she is eligible for a 2% raise. How much will she make after 2 years if she ge

sammy [17]

Answer:

$7.62 per hour

Step-by-step explanation:

Since, Heather gets a raise every 3 months, in 2 years, she will get a raise 8 times (2years = 24 months, 24 divided by 3 is 8).

Now it becomes a compound growth problem. We can use the formula shown below to solve these type of problems.

$F=P(1+r)^t$

Where,

F is the future value (what we want to find)
P is the present rate ($6.5)
r is the rate of growth, in decimal (2% growth means 0.02)
t is the time frame, number of times compounding occurs (for our case we have figured it to be 8)

<u>Now plugging in all the info, we get the value of F:</u>

$F=P(1+r)^t\\F=6.5(1+0.02)^8\\F=6.5(1.02)^8\\F=7.62$

Thus, after 2 years, Heather's hourly rate will be $7.62

7 0

3 years ago

Mr Langley sold all but 10 of his old computers for R500 each . He received R32 500 from the sale .How many computers did he ori

velikii [3]

Answer:

75 computers

Step-by-step explanation:

R 32500 / R 500= 65 sold

65 +10= 75 computers originally

5 0

3 years ago

MEC makes a big family tent in the shape of a symmetrical triangular prism. The floor of the tent is 5 m long and 2.5 m wide. Th

SVEN [57.7K]

Answer:

15,236 sq in

Step-by-step explanation:

First, you have to split the net into three rectangles and two triangles

step 1

triangular base area

1/2 bh = 1/2 (44 in)(64 in)

= 1/2 (2,816 sq in)

= 1,408 sq in.

2 x 1,408 sq in = 2,816 sq in.

step 2

end rectangle area

lw = (68 in)(69 in)

= 4,692 sq in

2 x 4,692 sq in = 9,384 sq in

Now find the area of the middle rectangle

lw - (69 in) (44 in) = 3,039 sq in.

then add all the areas together

2,816 + 9,384 + 3,036 = 15,236 sq in

Hope this helps :)

3 0

3 years ago

A woman begins driving her car 25 km north of calgary. Some time later, the woman and her car are 100 km north of calgary.

VARVARA [1.3K]

Well the displacement of milage from the 2 places if 75km however, the women and her car are in the same place so there is no displacement. But 75km is the correct mathematical answer.

4 0

3 years ago