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grigory [225]
3 years ago
5

Which expression is equivalent to 2(a+b2)-a-2b?

Mathematics
1 answer:
ICE Princess25 [194]3 years ago
6 0
3a-2b answer B, have a nice day bestie
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Pls give answer with formulas and steps 4/9 ÷ -5/7
katrin [286]

9514 1404 393

Answer:

  -28/45

Step-by-step explanation:

<u>Step 1, the sign</u>

When the fractions have an odd number of minus signs (1, not 0 or 2), the result will be negative. This knowledge lets you ignore the sign while you do the rest of the arithmetic. The appropriate sign is applied to the final numbers.

<u>Step 2, the formula</u>

The ratio (a/b)÷(c/d) is (ad)/(bc). There are several ways you can get there:

⇒ "invert and multiply" or "swap dot"

  \dfrac{a}{b}\div\dfrac{c}{d}=\dfrac{a}{b}\,\cdot\,\dfrac{d}{c}=\dfrac{ad}{bc} \quad\text{division is multiplication by the reciprocal}

⇒ "numerators of a common denominator"

  \dfrac{\left(\dfrac{a}{b}\right)}{\left(\dfrac{c}{d}\right)}=\dfrac{\left(\dfrac{ad}{bd}\right)}{\left(\dfrac{bc}{bd}\right)}=\dfrac{ad}{bc}

⇒ "swapped denominators of a common numerator"

  \dfrac{\left(\dfrac{a}{b}\right)}{\left(\dfrac{c}{d}\right)}=\dfrac{\left(\dfrac{ac}{bc}\right)}{\left(\dfrac{ac}{ad}\right)}=\dfrac{ad}{bc}

The use of common numerators or common denominators is most often seen when the numerator or denominator of one fraction is a multiple of that in the other fraction. <em>Example</em>: (2/3)÷(1/6) = (4/6)÷(1/6) = 4/1 = 4

<u>Step 3, reduce the result</u>

Any of these fractions is reduced by cancelling common factors from numerator and denominator. Your fractions here don't have any common factors, so there is nothing to cancel.

_____

Your product is ...

  (4/9) ÷ (-5/7) = -(4·7)/(9·5) = -28/45

6 0
3 years ago
Find the missing side in the similar figures below
amm1812

Answer:

i got stuck on this after solving the triangle. Below shows where I ended.

Step-by-step explanation:

1/2 * 12 * 25=150

6 0
3 years ago
Read 2 more answers
Select the best answer for the question
Rzqust [24]

Answer:

more info please

Step-by-step explanation:

6 0
3 years ago
Tim explained a function in words and Paul wrote an equation. Tim The amount of money in Marshas savings account increases at a
soldier1979 [14.2K]

Answer:

Tim has the smaller y-intercept = 2780

Step-by-step explanation:

Tim explains that Marshas saving increases by 225 per month. After 8 months, Marsha's has 4580 in his account.

Let m be the gradient(change per month)

Let y be the initial money in Marsha's account.

Let y1 be the amount in Marsha's account after 8 months

y1 = 4580

Let x be the initial month d money was put into the account.

Let x1 be the number of months it takes for money to increase to 4580

x1= 8

(y - y1) /(x - x1) = m

(y - 4580)/ (x - 8) = 225

y - 4580 = 225(x - 8)

y - 4580 = 225x - 1800

y = 225x - 1800 + 4580

y = 225x + 2780

Comparing with y = mx + c, c(intercept) = 2780

For Paul,

y - 1400 = 56(x + 26)

y -1400 = 56x + 1456

y = 56x + 1456 + 1400

y = 56x + 2856

Comparing with y = mx + c, c(intercept) = 2850

Therefore comparing Tim's Y intercept and Paul's Y intercept,

2780 < 2856

Tim's function smaller y intercept = 2780

7 0
4 years ago
2<br> 16<br> 2x-3) 3<br> Solve for x.
telo118 [61]

Answer:

c I know it I think c plz try it

7 0
3 years ago
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