Ask question

Ask question

All categories

4 years ago

12

Solve the following simultaneous equations using an appropriate method.

1 answer:

luda_lava [24]4 years ago

8 0

A) SUBSTITUTION: 4x + 3(-2x +8)=16
4x + -6x + 24 = 16
-2x= -8
x= 4
y= 0

b) ELIMINATION:
12x -8y = -76
-12x -15y = -39
-23y= -115
y=5
x= -3

c) ELIMINATION:
-12x+28y=36
12x-9y=21
19y= 57
X=4
y=3

d) SUBSTITUTION:
-4(23 -3y) +5y=-7
-92+12y+5y =-7
-92 +17y = -7
17y = 85
y=5
x=8

You might be interested in

Phoenix [80]

The correct answer would be A.36.

Hope this helps;)

6 0

3 years ago

Read 2 more answers

The polygons below are similar. Set up a proportion

m_a_m_a [10]

Answer:

<em>x = 42 </em>

Step-by-step explanation:

$\frac{18}{15}$ = $\frac{x}{35}$ ⇔ $\frac{6}{5}$ = $\frac{x}{35}$ ⇔ $\frac{6*7}{5*7}$ = $\frac{x}{35}$ ⇒ <em>x = 42</em>

4 0

3 years ago

3.The snow starts at a depth of 10 inches and melts to 2 inches over the span of 4 hours. Determine the rate of change over the

kap26 [50]

3. B: 2 inches

4. C: 9 people

5. B: 6 degrees

4 0

3 years ago

Harris has two pipes to fill his aquarium. Pipe A can fill the aquarium at the rate of 4 gallons per minute. Pipe B can fill the

IRINA_888 [86]

Pipe B is faster. I can't answer the second part. Pipe A pumps 15.16 liters btw

5 0

3 years ago

Wei has $150.00 to make a garland using 60-cent balloons. He wants to purchase 100 blue balloons and some number of white balloo

poizon [28]

Answer:

The answer is 0.60b + 0.30w = 150; 60 + 0.30w = 150

Step-by-step explanation:

Wei can purchase 300 balloons.

The model used for the problem is .

Step-by-step explanation:

Let the number of white balloons = x

The cost of blue balloons and white balloons are 60 cent = $0.6 and 30 cents = $0.3 respectively.

Wei purchased 100 blue balloons and have $150 to buy both balloons

9 0

3 years ago

Read 2 more answers