(8) =b
explaintion is : 3 seven times is 21
Answer: B
Step-by-step explanation:
North and North and South and South can't connect.
To have a magnetic effect North and South have to connect.
B has north and south together, so that is the correct answer
Assuming you mean
(x-2)²=49
sqare root both sides and take positive and negative roots
x-2=+/-7
add 2 to both sides
x=2+/-7
x=2+7 and 2-7
x=9 and -5
Answer/Step-by-step explanation:
#8. Using the geometric mean theorem formula, h = √xy, where,
h = x
x = 4 and y = 16
Plug in the values
x = √(4*16)
x = 8
#9. Using the geometric mean formula, h = √xy, where,
h = y
x = 5 and y = 8
Plug in the values into the formula:
y = √(5*8)
y = √40
y = 6.3 (nearest tenth)
#10. Using the geometric mean formula, h = √xy, where,
h = 18
x = 12 and y = y = ???
Plug in the values into the formula:
18 = √(12*y)
Square both sides
18² = 12y
324 = 12y
Divide both sides by 12
27 = y
y = 27
Answer:
420
Step-by-step explanation:
(−5)(−2)(−7)
(-) × (-) = (+)
(+) × (-)= (-)
-) × (-) = (+)
(−5)(−2)(−7)(−6)= 5×2×7×6 =10×42420
