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loris [4]
3 years ago
7

Given m || n, find the value of x and y

Mathematics
1 answer:
Serjik [45]3 years ago
5 0

Step-by-step explanation:

5x-6+7x+18=180

12x=180+6-18

12x=168

168÷12=14

X=14

for y

3y+11=7x+18(7×14+18)

3y+11=116

3y=116-11

3y=105

y= 35

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Evaluate the numerical expression. − 1 3 − (− 4 9 )
notka56 [123]
Two negatives make a positive so, -13 - (-49) equals -13 + 49, or 49-13, they are all the same thing, all equal to 36. 
6 0
3 years ago
A rectangular plot of farmland will be bounded on one side by a river and on the other three sides by a single-strand electric f
likoan [24]

Step-by-step explanation:

Let x be the length and y be the width of the rectangular plot.

The plot is bounded on one side by a river and on the other three sides by a single-strand electric fence. It means,

x+2y = 1500

x = 1500 - 2y ....(1)

We know that the area of a rectangular plot is given by :

A = xy ....(2)

Put the value of x from equation (1) in (2)

A=(1500-2y)y\\\\A=1500y-2y^2 .....(3)

For largest area, differentiate above area equation wrt y.

\dfrac{dA}{dy}=\dfrac{d}{dy}(1500y-2y^2)\\\\=1500-4y\\\\\text{Put}\ \dfrac{dA}{dy}=0\\\\1500-4y=0\\\\y=\dfrac{1500}{4}\\\\=375

Put the value of y in equation (1).

x = 1500-2(375)

= 750 m

Put the value of y in equation (3).

A =1500(375)-2(375)^2\\A=281250\ m^2

Hence, the largest area is 281250 m² and its dimensions are 750 m and 375 m.

3 0
3 years ago
Please please please please help me someone
Shtirlitz [24]

Answer:

That incorrect

Step-by-step explanation:

Yes

3 0
3 years ago
Find the quotient:<br> 3)21<br> A. 6<br> B. 7<br> C. 8<br> D. 9
finlep [7]
The answer is B:7!!!!!!!
4 0
3 years ago
Please answerrree my quess​
KengaRu [80]
Answer: 2 197/1000


Explanation:

(1 3/10)^3
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= 13^3/10^3
= 2197/1000
= 2 197/1000
3 0
3 years ago
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