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riadik2000 [5.3K]
3 years ago
9

Given x : y: z = 5:1:3 and z - y = 28. find the value of x + y​

Mathematics
1 answer:
Vera_Pavlovna [14]3 years ago
5 0

Answer:

x + y = 84

Step-by-step explanation:

Given

x : y : z = 5 : 1 : 3, then

\frac{x}{y} = 5 ( multiply both sides by y )

x = 5y ←

and \frac{y}{z} = \frac{1}{3} ( cross- multiply )

3y = z

Substitute z = 3y into z - y = 28

3y - y = 28

2y = 28 ( divide both sides by 2 )

y = 14 ← ←

Substitute y = 14 into x = 5y

x = 5 × 14 = 70 ← ←

Substitute y = 14 into z - y = 28

z - 14 = 28 ( add 14 to both sides )

z = 42 ← ←

Thus x = 70, y = 14 and z = 42

Hence x + y = 70 + 14 = 84

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Which number has two lines of symmetry?<br><br> 101<br> 619<br> 33<br> 18 <br> not multiple answer
podryga [215]

Answer:

The number is 33

Step-by-step explanation:

8 0
3 years ago
Bargain Town has 30% off all dresses. Find the sale price of a dress that regularly sells for $98
baherus [9]
You want to buy something that costs $98, and it's on sale for 30% off. What is the item's sale price?
First, convert the 30% to a real mathematical number. For percents, this is always done by dividing the 30% by 100%, or 30% / 100% = 0.300.

Second, find out what 30% of $98 is. This is the amount of the sale discount. This is always found by mulitplying 0.300 by the item's cost $98, like this:

0.300 x $98 = $29.40.
So for this sale, you'll save $29.40 on this item.

This means, the cost of the item to you is

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3 0
3 years ago
Identify the graph of f(x)=4^x
Wittaler [7]

Answer:

the first one

Step-by-step explanation:

The correct one is the one in the top left corner.


A great website to find out things like this is

https://www.mathpapa.com/algebra-calculator.html


5 0
3 years ago
Given m ZLMN = 145°, what is m ZXMN?<br> Show all relevant work.
myrzilka [38]
80 degrees. 145 = (4x+5) + (6x-10) = 10x-5... so 10x = 150, x = 15. LMN = 6x-10 = 6(15) - 10 = 80.
4 0
3 years ago
Question 10(Multiple Choice Worth 1 points)
tangare [24]

Good morning ☕️

Answer:

4(x + 3)(2x − 7)

Step-by-step explanation:

4(x + 3)(2x − 7) = 4(2x² − 7x + 6x − 21)

                        = 4(2x² − x − 21)

                        = 8x² − 4x − 84

____________________________

:)

5 0
3 years ago
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