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Solve algebraically: 6a+b = 16 and 5a - 2b = 19

6a + b = 16 (1) 5a - 2b = 19 (2) (1) x 2: 12a + 2b =32 (1) + (2): 12a + 2b + 5a - 2b = 32 + 19 = 51 17a = 51 a = 51 / 17 = 3 Substitue a = 3 back into (1): (6 x 3) + b = 16 18 + b = 16 b = 16 - 18 = - 2 Subs...
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Answered by Niva R. • Maths tutor
3703 Views

When do I use être in the perfect tense?

The most popular and useful way of remembering when to use être in the perfect tense, is the MRS VANDERTRAMP list: Monter, Retourner, Sortir, Venir, Arriver, Naitre, Descendre, Entrer, Rester, Tomber, Rentre...
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Answered by Kiah B. • French tutor
3067 Views

You read this comment in a magazine. 'Oggi mi rendo conto che, in realtà, il problema più grosso è che ci sono troppe macchine in centro. Non c’è una zona pedonale e l’aria è molto inquinata.' Which problem is mentioned?

A. Traffic accidents B. Noise pollution C. Air pollution - C is the correct answer.
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Answered by Riccardo D. • Italian tutor
3360 Views

Solve 0=X^2 +5x +4

0= (x + 4)(x + 1) x= - 4 x= - 1
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Answered by Rebecca W. • Maths tutor
3416 Views

Does reactivity increase or decrease as you go down group 7?

Reactivity will decrease as you travel down group 7 in the periodic table. Group 7 elements need to gain an electron to become stable as they need 8 electrons in their outer shell. Group 7 elements only cont...
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Answered by Rebecca W. • Chemistry tutor
17570 Views