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natka813 [3]
3 years ago
13

Look at the picture and plzz help me and also pick from the boxed sentences

Mathematics
1 answer:
poizon [28]3 years ago
3 0
<h2>Hello!</h2>

The answers are:

3. Addition property of equality

4. 6x-7+7=12+7 - Simplification

7. x=\frac{19}{6}

<h2>Why?</h2>

To solve the problem, we need to start with the result of the second step:

6x-7=12

So,

For the step 3:

Then, for the 3rd step, we have to apply the addition property of equality.

The addition property of equality states that if we add a term to one side of the equality, we need to add it to the other side of the equality, in order to not alterate the equality.

Then, applying the property, we have:

6x-7=12

Adding 7 to both sides, we have:

6x-7+7=12+7

For the step 4:

Now, for the 4th step, we have to simplify the expression:

6x-7+7=12+7

Then, simplifying, we have:

6x=19

For the step 7:

Simplificating, we divide each side of the equality by 6:

\frac{6x}{6}=\frac{19}{6} \\\\x=\frac{19}{6}

Have a nice day!

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Answer:

( x − 1 ) ( x +3 )

8 0
3 years ago
The sum of 2 numbers (x and y) is 20, and their product is 51. What are the values of x and y
Murljashka [212]

Answer: 13&7

Step-by-step explanation:

The sum of two numbers x&y is 20

Product of the 2numbers xy is 51

X+y=20......equation 1

XY=51.........equation 2

X=20-y.......equation 3

Substitute for x inequation 3 into equation 2

So we have;

(20-y)y=51

Open the bracket

20y-y^2=51

Collect like terms,so we have

Y2-20y+51=0

Factorise

Factors of 51 is 13&7

So -13-7=-20 &-13×-7=51

Substitute

Y2-13y-7y+51=0

Y(y-13)-7(y-13)=0

(Y-7)(y-13)=0

Y-7=0

Y=7 or

Y-13=0

Y=13

Y=13 or 7

Substitute for y in equation 1

X+y=20

X+7=20

X=20-7

X=13 or

X+13=20

X=20-13

X=7

Therefore, X &Y = 13 &7

4 0
3 years ago
Mary rode her bike for 2 2/5 miles on Wednesday. On Thursday, she biked 1 1/4 times as far as on Wednesday. How many miles did M
snow_lady [41]
2 2/5=12/5
1 1/4=5/4
12*5=60
5*4=20
60/20=3
So the answer is 3 miles
8 0
3 years ago
Can someone please help me?
Aneli [31]

Answer:

A

Step-by-step explanation:

to find the inverse, there are two steps

1-interchange x and y

2-solve for y

so y=x+1/x

interchange to get x=y+1/y

and solving for y we multiply both sides by y to get xy=y+1

subtract both sides by y yielding xy-y=1

factor out y to get y(x-1)=1

then divide to get y=1/x-1

7 0
3 years ago
Hello!! I Need HElp ASAP PLEAASSEE
MatroZZZ [7]

Answer:

  a = -1

Step-by-step explanation:

The line of symmetry for the parabola given by ...

  y = ax² +bx +c

is

  x = -b/(2a)

Using the given values, we have ...

  -2 = -(-4)/(2a)

Multiplying by -a/2, we get ...

  a = (4/2)(-1/2) = -1

The value of "a" is -1.

8 0
3 years ago
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