1 lb=16 oz
1 x 2.5=2.5 lb 16 oz x 2.5=40 oz
so 2.5 lb= 40 oz
Therefore, they weigh the same amount
Answer:
200 berlindes
Step-by-step explanation:
Vamos representar
O número total de berlindes na caixa = X
Mármores vermelhos = 20% de X
= 0.2X
Mármores amarelos = 40% de X
= 0.4X
Mármores azuis = 80
Conseqüentemente,
0.2X + 0.4X + 80 = X
Recolher termos semelhantes
80 = X - 0.2X - 0.4X
80 = X - 0.6X
80 = 0.4X
Divida ambos os lados por 0.4
X = 80 / 0.4
X = 200
Uma vez que X representa o número total de berlindes na caixa, portanto, o número total de berlindes na caixa = 200 berlindes
Answer:
9. -4x+19y-7
10. 7x+20
Step-by-step explanation:
9. To simplify this expression, simply combine like terms. Add all of the terms with the x variable together, then the terms with the y variable, then the constant terms. I will show this step by step, but usually you do not have to show this work. The order of the terms does not matter.
x variable terms: (4x-8x)+7y-2+6y+6y-5= -4x+7y-2+6y+6y-5
y variable terms: (7y+6y+6y)-4x-2-5=19y-4x-2-5
constant terms: (-2-5)-4x+19y=-4x+19y-7
10. To simplify this expression, expand all terms and then combine like terms. The first term can be expanded by multiplying each term in the parentheses by 2.
Expand terms: 2(5+3x)+(x+10)= 10+6x+x+10
Now, you can combine like terms as done on the last problem. Note that I got rid of the parentheses in the second term, as they did not matter (since there was no term in front of them).
x variable terms: (6x+x)+10+10=7x+10+10
constant terms: (10+10)+7x=7x+20
Is it for the fraction part? to get rid of the fractions just multiply both sides by the denominator.
Answer:
To create a trinomial square on the left side of the equation, find a value that is equal to the square of half of
b
.
(
b
2
)
2
=
(
−
3
)
2
Add the term to each side of the equation.
x
2
−
6
x
+
(
−
3
)
2
=
22
+
(
−
3
)
2
Simplify the equation.
Tap for more steps...
x
2
−
6
x
+
9
=
31
Factor the perfect trinomial square into
(
x
−
3
)
2
.
(
x
−
3
)
2
=
31
Solve the equation for
x
.
Tap for more steps...
x
=
±
√
31
+
3
The result can be shown in multiple forms.
Exact Form:
x
=
±
√
31
+
3
Decimal Form:
x
=
8.56776436
…
,
−
2.56776436
…
Step-by-step explanation:
thats took a while lol
