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shusha [124]
4 years ago
9

−8y ≥ 48

Mathematics
1 answer:
PilotLPTM [1.2K]4 years ago
6 0
First divide both sides by -8. Remember when you divide by a negative for an inequality, you have to flip the inequality sign.

So the answer is:
y < or equal -6
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Maria comprou 21 metros de corda. Depois comprou 33 metros do mesmo tipo de corda, pagando R$ 9,60 a mais do que pagou na primei
Damm [24]

Vamos calcular quantos metros de corda Maria comprou na segunda vez:

33 - 21 = 12


Ela pagou R$ 9,60 a mais na segunda compra do que na primeira.


Logo, Maria pagou R$ 9,60 em 12 metros


Agora vamos calcular quanto ela pagou por metro:

9,60 ÷ 12 = 0,80


R$ 0,80 por metro


Para saber quanto Maria gastou na primeira compra multiplicamos os 21 metros pelo seu valor unitário:

21 × 0,8 = 16,80


Resposta: R$ 16,80 Letra B



4 0
3 years ago
Read 2 more answers
Solve these simultaneous equations.<br> 4x – 7y = – 5<br> 3x – 2y = – 7<br> Solution: x=
AlexFokin [52]

Answer:

  1. \huge{x =  -  \frac{5}{4}  +  \frac{7}{4} y}
  2. \huge{x =  -  \frac{7}{3}  +  \frac{2}{3} y}

Step-by-step explanation:

1. 4x - 7y =  - 5

4x =  - 5 + 7y

\boxed{\green{x =  -  \frac{5}{4}  +  \frac{7}{4} y}}

y E R

○○•○○

2. 3x - 2y =  - 7

3x =  - 7 + 2y

\boxed{\green{x =  -  \frac{7}{3}  +  \frac{2}{3} y}}

y E R

5 0
3 years ago
If x=6 find the value of 3x
Nesterboy [21]

Answer:

3 (6) = 18

Step-by-step explanation:

7 0
4 years ago
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Which of the following represents the opposite of - 547
erastovalidia [21]
$54 towe my friend degrees
7 0
3 years ago
Second derivative of -2x^2+2/(x^2+1)^2
Colt1911 [192]

Answer:

\frac{-2x^2+2}{x^4+2x^2+1}

2x^2+2

-------------

x^4+2x^2+1

8 0
3 years ago
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