Answer:
(2 , 5)
Step-by-step explanation:
Step 1: Subtract to eliminate x and solve for y
4x - 3y = -7
- 4x + y= 13
----------------
-4y = -20
y = 5
Step 2. Plug in the value of y into one of the equations and solve for x.
4x - 3y = -7
4x - 3(5) = -7
4x - 15 = -7
4x = 8
x = 2
tadah!
Answer:
(B
The given system of equations are:
y=x^2+3x+3y=x
2
+3x+3 (1)
and y=x^2+x+2y=x
2
+x+2 (2)
Subtracting equation (2) from (1), we get
0=2x+10=2x+1
⇒2x=-12x=−1
⇒x={\frac{-1}{2}}x=
2
−1
⇒x=-0.5x=−0.5
Now, substituting the value of x=-0.5 in equation (2), we get
y=0.25-0.5+2y=0.25−0.5+2
⇒y=1.7y=1.7
Thus, the values of x and y are -0.5 and 1.7.
Therefore, the approximate solution of the given system of the equation is (-0.5, 1.7).
Hence, option (B) is correct.
Fiona drives 3 1/2 hours on highway = 3.5 hours
average 60 miles per hour on highway.
Then 3.5 * 60 =210 miles
1 1/2 hours in the city = 1.5 hours
average 30 miles per hour in city
Then 1.5 *30 = 45 miles
So
Fiona drives 210 miles on highway and 45 miles in city.
Total of her trip to her grandmother's house equals:
210 + 45 = 255 miles
She drives 3.5 on highway and 1.5 in the city, then total driving should be:
3.5 + 1.5 = 5 hours
Average speed for the entire trip:
255 /5 = 51 miles
The answer would be A. 220. Hope I could help!
Answer: 65 ≤ x ≤ 88
Step-by-step explanation:
Let x denotes the temperature of the town for a given month.
Given : Climate A town's high temperature for a given month is 88°F and the low temperature is 65°F.
i.e. 65°F ≤ temperature in a given month ≤ 88°F
Replace temperature in a given month by x.
Thus the compound inequality to represent the range of temperatures for the given month :-
i.e. 65 ≤ x ≤ 88
