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3 years ago

Substitution y=2x-1 Y=-3x-6

2 answers:

7 0

Y = 2x - 1
y = -3x - 6

Since y of the first equation is equal to y of the second equation, then what each y is equal to in the two equations is equal.

2x - 1 = -3x - 6

Add 3x to both sides.

5x - 1 = -6

Add 1 to both sides.

5x = -5

Divide both sides by 5.

x = -1

Now substitute -1 for x in the first original equation.

y = 2x - 1

y = 2(-1) - 1

y = -2 - 1

y = -3

Solution: x = -1 and y = -3

Mice21 [21]3 years ago

6 0

-3x-6=2x-1
5x=-5
x=-1

y=-3(-1)-6
y=3-6
y=-3

hope this helps!

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The product of 7 and a number is 126. Find the number

fenix001 [56]

Answer:

Step-by-step explanation:

Product of 7 and a number is 126.

Let's form the equation,

→ 7 × x = 126

The required value of x will be,

→ 7 × x = 126

→ x = 126/7

→ [ x = 18 ]

Hence, the number is 18.

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2 years ago

Plss help (ZOOM IN TO SEE FULL PIC)

shepuryov [24]

Answer:

H = 35

Step-by-step explanation

21 / 3 is 7 so multiply 7 by 5 to get 35. So 35 is equal to H.

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3 years ago

Please help very urgent on test...

stepladder [879]

Answer:

Equation: (2x+5)4=(2x+8)3

X: 2

Perimeter: 36

Step-by-step explanation:

You would multiply 2x+5 and 4 because there are four sides to a square, so the perimeter of the square would be 8x+20. This would go same for the triangle, making the perimeter 6x+24.

So 8x+20=6x+24 is your new equation. Then, you do the opposite of the order of operations, and add or subtract first. It would be easiest to subtract 20 and 6x from both sides.

That leaves you with 2x=4. Dividing 2 by both sides means x=2

You can plug this in to prove if it is correct.

16+20=36

12+24=36

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8 0

3 years ago

Help me please: answer as an improper fraction

rewona [7]

1) $\frac{7}{24}$
2) $\frac{2}{7}$
3) $\frac{1}{5}$
4) $\frac{3}{14}$
5) $\frac{1}{3}$
6) $\frac{7}{20}$
7) $\frac{6}{10}$
8) $\frac{1}{12}$
9) $\frac{1}{3}$
10) $\frac{1}{90}$
11) $\frac{1}{40}$
12) $\frac{1}{50}$
13) $\frac{20}{21}$
14) $\frac{1}{4}$
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17) $\frac{35}{12}$ ( $2 \frac{11}{12}$ )
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7 0

3 years ago

The |6f|= -2 I don't understand what to do

aleksandr82 [10.1K]

First you are going to solve for f.

6f = -2

you must get f alone so you divide both sides of the equation by 6 which becomes ....

f = -3

now you add the absolute value sign to -3. absolute value is how far away your answer is from 0. -3 is 3 away from zero so f = 3

8 0

3 years ago