Answer:
72 km/h
Step-by-step explanation:
We need to convert units
so:
20 m ----- 1 km -------- 3600 s
1 s ----- 1000 m ----1 h
and solve ot
20 x 1 x 3600 s = 72000 we multiply numerators
1s x 1000 m x 1 h = 1000 we multiply denominators
we divide de results 72000/1000 = 72
The shape resulted is a square
We know that
scale =measure in the map/measure in the actual
measure in the actual=measure in the map/scale
scale=1 cm/ 80 mi
for
measure in the map=7.5 cm
measure in the actual=?
measure in the actual=7.5 /(1/80)-----> 7.5*80-----> 600 mi
the answer is
<span>the actual distance between the two cities is 600 miles</span>
We will express second equation in first.
y = 3x + 2
after that we get:
3x + 2 = x^2 + 3x - 7
x^2 -9 = 0
x^2 = 9
x1 = 3
x2 = -3
y1 = 3*3+2 = 11
y2 = -3*3 + 2 = -7
we get pairs:
(3,11) and (-3,-7)
Answer is first option.
Answer:
1. D
2. C
3. B
4. A
look at the symbols and you will notice each of them will be easy to understand
The line under the symbol mean equal to so closed circle
