3 years ago

Find the solution set for the system of equations. 9x + 5y = 28 5x + 9y = 56

1 answer:

6 0

First step find a common multiple, e.g. 45 and subtract
9x + 5y = 28 * 5
5x + 9y = 56 * 9

45x + 25y = 140
-(45x + 81y = 504)
-56y = -364
56y = 364
y = 6.5

Substitute into any equation
9x + 5(6.5) = 28
9x + 32.5 = 28
9x = -4.5
x = -0.5

x = -0.5 , y = 6.5

You might be interested in

Which pairs of polygons are congruent?

NeX [460]

Answer:

The answer is D. pairs 1 and 3

8 0

3 years ago

Read 2 more answers

Two shops sell the same brand of baked beans but in different sizes of tin. Calculate the price of 1 kg of baked beans for each

SIZIF [17.4K]

Answer:

Shop A = 113 pence

Shop B = 101 pence

Step-by-step explanation:

Given :

Shop A :

5kg for £5.65

Shop B:

2kg for £2.02

Price per kg :

weight / price

100 pence = £1

Shop A :

Price of 1kg :

5.65 / 5 = £1.13 = 113 pence

Shop B:

2.02 / 2 = £1.01 = 1.01 * 100 = 101 pence

4 0

3 years ago

All simplified answers for 6x+1-(3x-1)

sertanlavr [38]

Answer:

Step-by-step explanation:

Simplify ——————

3x - 1

Equation at the end of step 1 :

(6x - 1)

y - ———————— = 0

3x - 1

Step 2 :

Rewriting the whole as an Equivalent Fraction :

2.1 Subtracting a fraction from a whole

Rewrite the whole as a fraction using (3x-1) as the denominator :

y y • (3x - 1)

y = — = ————————————

1 (3x - 1)

7 0

3 years ago

A number in expanded form is shown. 4×1+3×1/100+9×10+5×1/10

77julia77 [94]

The real answer is going to be 23.5

3 0

3 years ago

Plz help I have 20 min to submit

DENIUS [597]

Answer:

1 and A, Solution = (3,14): 3 and B, Solution = (-4.5,-19): 2 and C Solution = (-10,7)

Step-by-step explanation:

8 0

2 years ago