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IrinaK [193]
3 years ago
10

Simplify the expression using the order of operations.

Mathematics
2 answers:
Brrunno [24]3 years ago
8 0

Answer:

72

Step-by-step explanation:

7x 6 + 6 x 5

42 + 6 x 5

42 + 30

72

marin [14]3 years ago
8 0

Answer:

72

Step-by-step explanation:

7x6= 42

6x5 =30

42+30=72

or

take 6 out

6(7+5)

6(12)

72

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What is the value of the y-intercept of the line 7x-4y=20?<br> 7/4<br> 5<br> -5
USPshnik [31]

Answer:

-5

Step-by-step explanation:

Once you get y alone the equation will look like this y=-7/4x-5.

The slope intercept form dictates that y=mx+b, with b being the y-intercept, so -5 is b, therefore the y intercept.

3 0
3 years ago
Find 2 numbers who product is 15 and sum is 16.​
Marizza181 [45]

Answer:

15 and 1

Step-by-step explanation:

x and y are two numbers.

Two equations:

x · y = 15

x + y = 16

Rearrange one of the equations (I'll rearrange the sum equation):

x + y = 16

x = 16 - y

Substitute that to the other equation and solve for y:

x · y = 15

(16 - y) · y = 15

16 - y · y = 15

16 - y² = 15

-y² = 15 - 16

-y² = -1

y² = 1

y = √1

y = 1

Now substitute that to any of the equation and solve for x (in here, I'll choose the multiplication one):

x · y = 15

x · 1 = 15

x = 15

Now verify:

15 · 1 = 15

15 + 1 = 16

This is correct

6 0
3 years ago
How can you distinguish if the solution is one value, all real numbers, or no solutions?
murzikaleks [220]

Answer:

If x can only have one answer, then the solution is one value. If x can be all real numbers, then the solution is all real numbers. And if x doesn't have an answer then it has no solution.

Step-by-step explanation:

For example:

One value: 7 + x= 10 => x= 3

All real numbers: 0x=0 => x can be all real numbers

No solutions: 7x=6x => no solutions

8 0
3 years ago
What are not the multiples of 4
Goshia [24]
Is this multiple choice
5 0
3 years ago
The first difference of a sequence is 1, 4, 7, 10, 13…
Rama09 [41]

Answer:

1) {4, 5, 9, 16, 26, 39}

2) {3, 4, 8, 15, 25, 38}

3) {3, 4, 8, 15, 25, 38}

Step-by-step explanation:

Hi!

Let's call the sequence {x₁, x₂, x₃, etc}

The information you have is the difference between to consecutive terms:

x_2-x_1= 1\\x_3-x_2= 4\\x_4-x_3= 7\\x_4-x_5= 10\\x_6-x_5= 13

1) Data: x₁=4, then to get x₂ you sum 1, and get x₂=5. Then to get x₃ you sum 4, and get x₃=9, and so on. Result:  {4, 5, 9, 16, 26, 39}

2) Data: x₁ + x₂ = 7. You know that x₂ = x₁ + 1. Then:

x_1+x_2 = x_1 +x_1 +1= 2x_1+1=7\\x_1=3\\x_2= x_1 +1 = 3+1=4

If you continue the same process as in 1), you get {3, 4, 8, 15, 25, 38}

3) Data: x₅ = 25. If you look at the result in 2), you see that x₅ = 25 there!

So the sequence in this case is the same as before {3, 4, 8, 15, 25, 38}

8 0
4 years ago
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