Answer:
So since you have the ratio of 1 : 4
we need to find 3 : x
since 1*3 = 3. We multiply all by 3
4*3 =12.
Answer is 12
Answer:
show us the graph
Step-by-step explanation:
X=1,
X=-3
Use Photomath it helps
Answer:
56
Step-by-step explanation:
Complete question:
Z varies jointly with x and y , x=2 and y=2, z=7. Find z when x=4 and y=8 using joint variation . (I need the problem worked out step by step)
If z varies jointly with x, and y, this is expressed as;
z = kxy
If z=7 when x= 2, y= 2
7 = k(2)(2)
7 = 4k
k = 7/4
To get z when x= 4 and y = 8
z = kxy
z =7/4 (4)(8)
z = 7*8
z = 56
Hence the value of z is 56
In 4 hours, she read 3 chapters.
In 1 hour, she reads 3/4 chapters.
In 10 hours, she reads 3/4 x 10= 3/2 x 5 = 15/2 = 7 and a half chapters.
