3 years ago

Solve equations by using elimination -4+5y= 13 X-5y=21 ( , )

Mathematics

1 answer:

tigry1 [53]3 years ago

5 0

Answer:

y=17/5 ,x= 38

Step-by-step explanation:

-4+5y =13 add 4 both side

4-4+5y=13+4

5y=17

5y/5=17/5 y=17/5

x-5y=21

x-5(17/5)=21

x-17=21

x=21+17= 38

You might be interested in

This is the variable, usually shown on the y-axis, that gets its value from the one on the x-axis.

Furkat [3]

You need to have a little more detail in your answer, sir or madam.

8 0

4 years ago

If 70% of children who like green are boys,how many boys like green?

galben [10]

Answer:

How many boys are there in total? We can't answer correctly until you give us all the information.

Step-by-step explanation:

7 0

3 years ago

You anyone want points 2+2

geniusboy [140]

Answer:

Step-by-step explanation:

either 22 or 4 but my money is on 4

5 0

3 years ago

If w 1,-5> and y=<2,3>,find 2w+y

kolezko [41]

Answer:

Step-by-step explanation:

Yes

But no

But yes

=mum

7 0

3 years ago

On a partly cloudy day, Derek decides to walk back from work. When it is sunny, he walks at a speed of s miles/hr (s is an integ

Setler [38]

Answer: $\frac{1}{7}$

Step-by-step explanation:

Given

sunny day speed= s mph

Rainy day speed=s+1 mph

Derek average speed =2.8 miles/hr

s<2.8<s+1

so on sunny day speed must be 2 mph

and on rainy day speed must be 3 mph

$v_{avg}=\frac{distance}{time\ taken}$

Let x be the distance traveled in sunny and y be the distance traveled in rainy weather

$2.8=\frac{x+y}{\frac}{x}{2}+\frac{y}{3}}$

Let $\frac{x}{y}=z$

$2.8=\frac{z+1}{\frac{z}{2}+\frac{1}{3}}$

$z=\frac{1}{6}$

Fraction of distance traveled on sunny weather

$\frac{x}{x+y}=\frac{z}{z+1}=\frac{1}{7}$

5 0

3 years ago