Answer:
the 4th one is 23 x 2x = 98+4
Step-by-step explanation:
Answer:
(8x+15)=(7x+17){ being alternative angle}
8x+15=7x+17
8x-7x=17-15
x=2
here,
8x+15= 8×2+15
16+15=31
7x+17
7×2+17
14+17
31
again
(8x+15)+y=180°( being straight angle)
31+y=180
y=180-31
y= 149
Answer:
1/sqrt10
Step-by-step explanation:
1) Find out cosA using formula (cosA)^2+(sinA)^2=1
The module of cosA= sqrt (1- (-3/5)^2)= sqrt 16/25=4/5
So cosA=-4/5 or cosA=4/5.
Due to the condition 270degrees< A<360 degrees, 0<cosA<1 that's why cosA=4/5.
2) Find sinA/2 using a formula cosA= 1-2sinA/2*sinA/2 where cosA=4/5.
(sinA/2)^2= 0.1
sinA= sqrt 0.1= 1/ sqrt10 or sinA= - sqrt 0.1= -1/sqrt10
But 270°< A< 360°, then 270/2°<A/2<360/2°
135°<A/2<180°, so sinA/2 must be positive and the only correct answer is
sin A/2= 1/sqrt10
Answer: (x-1)(3x+8)
Step-by-step explanation:
Slide and divide method
See what multiplies to get -24 (because of 3 and -8) and what adds to get 5
Put those into factoring form (x-3)(x+8) without a number in front of the x’s
Divide the numbers by what isn’t in front of the x’s (-3/3 and 8/3)
Simplify them and if it doesn’t divide perfectly, put the denominator in front of the x
Solution
**I can’t explain it well but watch a video on the method AND ONLY DO IT IF IT WORKS WELL FOR YOU**
Answer:
A
Step-by-step explanation:
A 2-column table with 5 rows. Column 1 is labeled Key Words with entries twelve, more than, quotient, a number, eight. Column 2 is labeled Replace with entries 12, +, divided by, k, 8.
Write and evaluate the expression. Then, complete the statement.
twelve more than the quotient of a number and eight
The value of the expression when k = 40 is
.
