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ki77a [65]
3 years ago
6

On a certain day the exchange rate was 60 u.s dollars 50 euro. How many US dollars were 70 euro worth that day? Show that your a

wnser is reasonable
Mathematics
1 answer:
gayaneshka [121]3 years ago
8 0
This is what I got:

60/50 = X/70
70x60/59 = X
X = 84
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Find the solution of the system of equations.
avanturin [10]

Answer:

3

Step-by-step explanation:

The number is 3.

Step-by-step explanation:

Finding the Number

To find the number, we have to translate the problem above to an algebraic equation. The algebraic equation refers to the statement of the equality of two algebraic expressions.

Equation:

Let "x" be the number.

4 is divided by a number - 4/x

3 divided by the number decreased by 2 - 3/x-2

"4 is divided by a number is equal to 3 divided by the number decreased by 2"

4/x = 3/x-2

Solution:

Cross multiply.

4/x = 3/x-2

x(3) = 4(x-2)

3x = 4x - 8

(Combine similar terms.)

3x - 4x = - 8

- x = - 8

- x/- 1 = - 8/- 1

x = 8

Final Answer:

8

Checking:

4/x = 3/x-2

4/8 = 3/8-2

1/2 = 3/6

1/2 = 1/2 ✔

7 0
3 years ago
Using the given information write the equation of parabolas:
lana [24]

The general form of the equation we need to find is (x - h)^2 = 4p(y- k).

The center is the distance between the directrix and focus.

So, center (h, k) = (3, 3/2) .

P = distance from center to the focus and it just so happens to be 1.5.

We now plug everything into the formula given above.

(x - 3)^2 = 4(1.5)(y - 3/2)

(x - 3)^2 = 6(y - 3/2)

Done!

8 0
3 years ago
01:57:09 In a city, the distance between the library and the police station is 3 miles less than twice the distance between the
tester [92]

Answer:

Distance between the police station and the fire station be 4 miles

Step-by-step explanation:

Let distance between the police station and the fire station be x miles.

The distance between the library and the police station is 3 miles less than twice the distance between the police station and the fire station.

Distance between the library and the police station =2x-3

Also, distance between the library and the police station is 5 miles.

2x-3=5\\2x=3+5\\2x=8\\x=\frac{8}{2}\\ x=4\,\,miles

8 0
3 years ago
3 feet = _______ inches<br><br> help plzz :(
Romashka [77]

Answer:

36 inches

Step-by-step explanation:

We know that 1 ft = 12 inches

2 ft = 2 * 12 = 24 inches

3 ft = 3*12 = 36 inches

3 0
3 years ago
Read 2 more answers
Given the diagram, as labeled, at the right.Find x.<br> A) 4<br> B) 8<br> C) 4√2<br> D) 8√2
Trava [24]

Answer:

cos45=×/4

\cos(45 )  = x  \div 4 \sqrt{2}

6 0
3 years ago
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