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frez [133]
2 years ago
12

X+y=3 2x-y=0 substituition method

Mathematics
1 answer:
Veronika [31]2 years ago
5 0

Answer:

(1, 2 )

Step-by-step explanation:

x + y = 3 (subtract x from both sides )

y = 3 - x → (1)

2x - y = 0 → (2)

Substitute y = 3 - x into (2)

2x - (3 - x) = 0

2x - 3 + x = 0

3x - 3 = 0 ( add 3 to both sides )

3x = 3 ( divide both sides by 3 )

x = 1

Substitute x = 1 into (1)

y = 3 - 1 = 2

solution is (1, 2 )

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Who had a head start, and how many miles was the head start? Rita had a 28-mile head start. Roger had a 26-mile head start. Roge
serg [7]

Complete question is;

Roger and Rita each drive at a constant speed between Phoenix and San Diego. Each driver’s distance for the same section of the trip is displayed below. Who had a head start, and how many miles was the head start?

A) Rita had a 28-mile head start.

B) Roger had a 26-mile head start.

C) Roger had a 25-mile head start.

D) Rita had a 22-mile head start.

Answer:

A) Rita had a 28-mile head start.

Step-by-step explanation:

Let's assume that Roger travelled a distance of 60 miles

And that;

Rita travelled a distance of 32 miles

We are told that they travelled between Phoenix and San Diego.

Thus, it means that if they have different distances but covered same section of the trip, it means the one with higher distance started before the section of the trip.

Thus, it means that Rita had a head start of Roger since she covered only 32 miles.

Thus;

Rita had a head start of; 60 - 32 = 28 miles

4 0
2 years ago
If the Volume of a box is 250 feet3 and the height is 5 feet and the length is 5
Montano1993 [528]

Answer:

10 feet

Step-by-step explanation:

Use the volume formula, V = lwh, to solve for w

Plug in the values we know:

V = lwh

250 = (5)(w)(5)

250 = 25w

10 = w

So, the width is 10 feet

7 0
2 years ago
27% of what number is 162?
Leno4ka [110]
Take it like this
27% of x = 162
27/100 * x = 162
x = 162*100/27
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Therefore, 27% of 600 is 162
5 0
3 years ago
Read 2 more answers
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mestny [16]
I could be wrong, but I think it could be D, 18.5.
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likoan [24]

Answer:

x < \frac{9-4b}{a}

Step-by-step explanation:

Given

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Remembering to reverse the inequality symbol when dividing by a negative quantity, thus

x < \frac{9-4b}{a}

7 0
3 years ago
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