Answer: 4:5
Step-by-step explanation: First find a number 12 and 15 can both be divided by. I found 3, and did the following:
12/3=4
15/3=5
The ratio of boys to girls in Luka's math class is 4:5
Answer:
x = 35 degrees.
Step-by-step explanation:
These are 2 'same side' interior angles of a parallelogram whose sum is 180 degrees.
So we have th equation:
3x + x + 40 = 180
4x = 180 - 40
4x= 140
x = 140 / 4 = 35 (answer)>
Answer:
True
Step-by-step explanation:
trust me, i remember this question
Answer:
Step-by-step explanation:
Xavier, Yolanda and Zara shared some money.
Let x represent Xavier's share
Let y represent Yolanda's share
Let z represent Zara's share.
Yolanda received 40% more money than Xavier. This means that
y = x + 40/100×x = x + 0.4x = 1.4x
Zara received 60% of Yolanda's share. This means that
z = 60/100× 1.4 = 0.6×1.4 = 0.84x
. If Zara received $1,176, then,
0.84x = 1176
x = 1176/0.84 = 1400
y = 1.4 × 1400 = $1960
z = 0.84 × 1400 = $1176
The sum of the money is
1400 + 1960 + 1176 = $4536
Answer:
x = - 5
Step-by-step explanation:
Given y varies directly as x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = - 18 when x = 3 , then
- 18 = 3k ( divide both sides by 3 )
- 6 = k
y = -6x ← equation of variation
When y = 30 , then
30 = - 6x ( divide both sides by - 6 )
- 5 = x
