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2 years ago

1. Set up a system to find two numbers whose sum is 18 and whose difference is 4.

Mathematics

1 answer:

Alekssandra [29.7K]2 years ago

7 0

Answer:

7 and 11

Step-by-step explanation:

Suppose the numbers are x and y.

So it is given that

x + y = 18

x - y = 4

If we add the equations, we get

2x = 22

So x is 11 and y will be 7

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A gourment shop wants to mix coffe beans that cost $3.00 per pound with coffe beans that cost $4.25 per pound to create 25 pound

guajiro [1.7K]

If the gourmet shopkeeper mix 15 pounds of coffee beans which costs 3.0$ per pound with 10 pounds of coffee beans costing 4.25$ per pound.
The mixture of 25 pounds will cost 3.5$ per pound.

It can be found using
3*x + 4.25*(25 -x) = 25*3.50

4 0

2 years ago

What are different solutions of 1x +2y = 12

miv72 [106K]

Answer:

x=12, y=6

Step-by-step explanation:

Very simple!

Just substitute 0 for y and solve for x!

$x+2(0)=12$ (anything times 0 equals 0!)

$x=12$

Now you can do the same thing but substitute 0 for x!

$0+2y=12$

$y=6$

Hope this helps!

7 0

3 years ago

Read 2 more answers

NEED ANSWER ASAP!!! (EASY)

Nata [24]

3000(0.25)=750

C is correct. Hope this helps!

4 0

3 years ago

Read 2 more answers

The surface area of a cube is 150 cm2. what is the area of each face of the cube?

djyliett [7]

The area of each face is 25 cm

5 0

3 years ago

A boat sails 20 miles wast of the port and then 15 miles south to an island how far is the boat from the port if you measure thr

sweet-ann [11.9K]

Answer:

25 miles

Step-by-step explanation:

Given: A boat sail 20 miles west of the port and then 15 miles south to an island.

Picture attached.

The distance from port to island could be measured in a straight line. It will form a hypotenous.

∴ we can use Pythogorean theorem to find the distance.

$h^{2} = a^{2} +b^{2}$

Where, "a" is adjacent= 20 miles and "b" is opposite= 15 miles.

$h^{2} = 20^{2} +15^{2}$

⇒ $h^{2} = 400+225= 625$

⇒ $h^{2} = 625$

⇒ $h= \sqrt{625}= \sqrt{25^{2} }$

We know $\sqrt{x^{2} } = x$ .

∴ $h= 25\ miles$

∴ Distance of Port from the Island is 25 miles.

6 0

3 years ago