Answer:
9 and 8
Step-by-step explanation:
It is 9 and 8 since 9^2 is 81 and 8^2 is 64 and they are the powers that 80 lies between.
Remember, you can do anything to an equation as long as you do it to both sides
0.6x-10=1.4x-(-14)
and minusing a negative means adding
0.6x-10=1.4x+14
minus 0.6x from both sides
0.6x-0.6x-10=1.4x-0.6x+14
0-10=0.8x+14
-10=0.8x+14
minus 14 both sides
-14-10=0.8x+14-14
-24=0.8x+0
-24=0.8x
multily both sides by 10
-240=8x
divide both sides by 8
-240/8=(8x/8)
-30=(8/8)x
-30=1x
-30=x
x=-30
The answer is A because the ribbon is sold 12 inches length and 12+12 is 24 and then u need 3 so 6
Answer:
an equation.
Step-by-step explanation:
a statement of the equality of two mathematical expressions.
Answer:
The quantity of 40% hydrochloric acid mixed with 12 ounces of a 15% hydrochloric acid solutions is 18 ounces
Step-by-step explanation:
Given as :
Let The quantity of 40% hydrochloric acid mixed with 12 ounces of a 15%
hydrochloric acid = x ounces
So, Total quantity becomes = ( x + 12 ) ounces
<u>Now, According to question</u>
x × 40% + 12 × 15% = (x + 12) × 30%
Or, x × + 12 × = (x + 12) ×
Or, 40 x + 12 × 15 = (x + 12) × 30
Or, 40 x + 180 = 30 x + 360
Or, 40 x - 30 x = 360 - 180
Or, 10 x = 180
∴ x =
i.e x = 18 ounces
So, The quantity of 40% hydrochloric acid mixed with 12 ounces of a 15% hydrochloric acid solutions = x = 18 ounces
Hence, The quantity of 40% hydrochloric acid mixed with 12 ounces of a 15% hydrochloric acid solutions is 18 ounces . Answer