MATHEMATICS MIDDLE SCHOOL

If one US dollar is worth 0.79 euros (the currency used by European countries), how many euros would $18 inUS dollars be worth?
1. 18.79 euros
2. 14.22 euros
3. 14.12 euros
4. 7.11 euros
pls help me out pls

Answers

Answer 1

Answer:

Answer:

€14.22

Step-by-step explanation:

0.79 × 18 = 14.22

Answer 2

Answer:

Answer:

Choice 2

Step-by-step explanation:

1 dollar: 0.79 euros=

18 dollars:x euros

x=18*0.79 or 14.22 euros. Hope this helps!

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I have 1/2-1/7 and3/5-1/2

Answers

$(1)/(2)-(1)/(7)=\ \ \ | make\ common \denominator\n\n(7)/(14)-(2)/(14)=(7-2)/(14)=(5)/(14)\n\n(3)/(5)-(1)/(2)= \ \ \ | make\ common \denominator\n\n (6)/(10)-(5)/(10)=(1)/(10)$

1/2 - 1/7 = 7/14 - 2/14 = 5/14
3/5 - 1/2 = 6/10 - 5/10 = 1/10

Travis is building a rectangular sandbox for his younger brother. The length of the sandbox is 1 foot longer than twice the width of the sandbox. The perimeter of the sandbox is 29 feet.

Answers

let's say the width is x
we know that the length is 2x+1 (1 foot longer than twice the width)
the perimeter is all sides added up so that's x+x+2x+1+2x+1 which is simplified to 6x+2
we also know that the perimeter is 29, so 6x+2=29
take 2 from both sides to get 6x=27
divide both sides by 6 to get 4.5 therefore the width is 4.5
from this we know that the length is 2(4.5)+1 since x is 4.5
now we know the length is 10.
if you want the area it is 4.5 times 10 which is 45feet^2

The length of three sides of a triangle are 3x + 1/2, 2x +1/4, and x +1/2.Use the drop-down menu to complete the answer.

Answers

Answer: x= 41

Explanation: Angles 1 and 2 have to equal 180° since they are supplementary. So you put 3x+2x-25=180, you then add like terms. 5x-25=180 Then you have to isolate x, so you add 25 to both sides of the equation. 5x=205, then you divide both sides by 5. So your answer is x=41.

You can check to make sure by plugging in x for 41 .

Hope this helps!

Hi right now im doing homework about common denominators and for some reason I cant understand how to do it

Answers

It would be great if you added some more details, but for common denominators you try to find the least common number that the 2 or more of the numbers you got have!
For example:
1/2 and 2/3 if you multiply 2 by 3 and 3 by 2, they both are 6, so you would multiply 1/2 both by 3 to make it into 3/6 and 2/3 by 2 to make it into 4/6!

basically you have to find the lcm for the common denominator so that you can add/subtract them

John is 6 years older than Keisha. Together their ages equal four times Keisha's age. How old is each?

Answers

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Age of John = m

Age of Keisha = n

m = 6 + n

m + n = 4n

m = 9

n = 3

The age of John is 9

The age of Keisha is 3

What is an expression?

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

Let the age of John = m

Let the age of Keisha = n

Now,

John is 6 yearsolder than Keisha.

This means,

m = 6 + n _____(1)

Together their ages equal fourtimesKeisha's age.

This means,

m + n = 4n _____(2)

From (1) and (2) we get,

6 + n + n = 4n

6 + 2n = 4n

6 = 4n - 2n

6 = 2n

n = 3

Now,

m = 6 + n

m = 6 + 3

m = 9

Thus,

The age of John is 9

The age of Keisha is 3

Learn more about expressions here:

brainly.com/question/3118662

#SPJ2

J = K+6
K + J = 4K

Replace J in the second equation
K + (K + 6) = 4K
K + K + 6 = 4K
2K + 6 = 4K
Subtract 2K from each side
6 = 2K
Divide both sides by 2
K=3

So, Keisha is 3 and therefore John is 9 because 3 + 6=9

Rotate the figure 90 degrees clockwise. Then, mark the statements as true or false.