Answer:
Step-by-step explanation:
x²+3x+2=0
x²+x+2x+2=0
x(x+1)+2(x+1)=0
(x+1)(x+2)=0
x=-1,x=-2
so B
Answer:
m∠T = 68°
m∠U = 95°
m∠V = 112°
m∠W = 85°
Step-by-step explanation:
m<V = (14z - 7)°
m<W = 10z°
m<T = 8z°
Recall that the sum of the opposite angles of a cyclic quadrilateral equals 180°.
Therefore:
(14z - 7)° + 8z° = 180°
Find z
14z - 7 + 8z = 180
22z - 7 = 180
22z = 180 + 7
22z = 187
22z/22 = 187/22
z = 8.5
Answer: 3.25°C
Step-by-step explanation:
From the question, we are given the information that the mean temperature for the first 7 days in January was 3 °C. This means that the total temperature for the first 7 days in January was:
= 3°C × 7
= 21°C
We are also told that the temperature on the 8th day was 5°C. To calculate the the mean temperature for the first 8 days in January, we add the total temperature for the 8 days and then divide by 8.
The total temperature for the 8 days will be: = 21°C + 5°C = 26°C.
The mean temperature for the first 8 days in January will now be:
= 26°C/8
= 3.25°C
Answer:
Its the second one x=5
Step-by-step explanation:
I took the test.
Answer:
h ≈ 3.9
Step-by-step explanation:
Using the right triangle with hypotenuse 4
Use Pythagoras' identity
The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is
h² + 1² = 4²
h² + 1 = 16 ( subtract 1 from both sides )
h² = 15 ( take the square root of both sides )
h = ≈ 3.9 ( to the nearest tenth )