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3 years ago

-13/10x - 3/2 (11/6x +1)

1 answer:

4 0

So first simplify 11/6x into 11x/6. Then -13/10x into -13x/10. So you should now have (-13x/10-11x/4)-3/2. Combine the like terms -13x/10 and -11x/4 to get -81x/20 and then with your left over -3/2= -81x/20-3/2

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Three students are using different strategies to add 12+34.

Tanzania [10]

Answer:

12+34=46

A=38

B=58

C=46

the answer is student c writes

5 0

3 years ago

Which expression is equivalent to

Damm [24]

Answer:

$\frac{(2a+1)^{2} }{50a}$

Step-by-step explanation:

$\frac{2a+1}{10a-5} * \frac{4a^{2} - 1}{10a}\\ = \frac{2a+1}{5(2a-1)} * \frac{(2a+1)(2a-1)}{10a}\\=\frac{(2a+1)^{2} }{50a}$

1.The expression given is in division so when changing to multiplication the fraction is reversed.

2.Using algebra identity $a^{2} - b^{2} = (a+b)(a-b)$ .

3. Taking the common factor 5 out.

4. Finally cancelling the like terms from the numerator and denominator.

4 0

3 years ago

If a: b = 2:3, b: c = 4:3, and c: d = 7: 8, find a: d.

Taya2010 [7]

Answer:

a:d=7:9

Step-by-step explanation:

We have a system with 3 equation:

$\frac{a}{b}=\frac{2}{3}\\\frac{b}{c}=\frac{4}{3}\\\frac{c}{d}=\frac{7}{8}$

If we multiply all of these equations, then we have:

$\frac{a}{b}*\frac{b}{c}*\frac{c}{d}=\frac{2}{3}*\frac{4}{3}*\frac{7}{8}\\\frac{a*b*c}{b*c*d}=\frac{2*4*7}{3*3*8}\\\frac{a}{d}=\frac{56}{72}$

If we simplify this fraction dividing by 9, then:

$\frac{a}{d}=\frac{56:9}{72:9}=\frac{7}{9}$

Therefore, a:d=7:9

3 0

3 years ago

Please answer quickly

olchik [2.2K]

Answer:

a and c I think if I'm wrong I will try again

4 0

3 years ago

Read 2 more answers

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Vitek1552 [10]

Answer:

Please see attachment

Step-by-step explanation:

Please see attachment

5 0

4 years ago