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Gekata [30.6K]
3 years ago
11

• Write an expression that is equivalent to 3(7 + x). 3(7 + x) + ? 2

Mathematics
2 answers:
stira [4]3 years ago
4 0

Answer:

21+3x

Step-by-step explanation:

maksim [4K]3 years ago
3 0

Answer:

21+3x

Step-by-step explanation:

Expand this:

3(7+x)

So it becomes:

21+3x

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Need help with this question
sergiy2304 [10]

Answer:

  5

Step-by-step explanation:

The horizontal line y=3 intersects the graph in two places. It touches the peak at x = -7 (consistent with the question), and it crosses the line at x=5 (the desired answer).

  h(5) = 3

  x = 5 . . . for h(x) = 3

4 0
3 years ago
Does anyone know what goes into these blanks
avanturin [10]

yes I know but will not give answer because you have not say that

4 0
3 years ago
Sandra calculated the missing side length of one of these triangles using the Pythagorean Theorem. Which triangle is it?
gregori [183]
Triangle D
Because the Pythagorean Theorem is only used with a RIGHT triangle
3 0
2 years ago
ILL GIVE BRAINLIEST! PLEASE HELP I DONT UNDERSTAND!
blsea [12.9K]

Answer:

S₁₅ = 645

Step-by-step explanation:

The sum to n terms of an arithmetic sequence is

S_{n} = \frac{n}{2} [ 2a₁ + (n - 1)d ]

where a₁ is the first term and d the common difference

Using the nth term formula a_{n} = 5n + 3 , then

a₁ = 5(1) + 3 = 5 + 3 = 8

a₂ = 5(2) + 3 = 10 + 3 = 13 , then

d = a₂ - a₁ = 13 - 8 = 5

Thus

S₁₅ = \frac{15}{2} [ (2 × 8) + (14 × 5) ]

     = 7.5( 16 + 70)

     = 7.5 × 86

     = 645

7 0
2 years ago
6 pounds of apples and 3 pounds of oranges cost 24 dollars.5 pounds of apples and 4 pounds of oranges cost 23 dollars. Set up a
vitfil [10]

Answer:cost of each pound of apple= $3

And cost of each pound of orange =$2

Step-by-step explanation:

Step 1

Let cost of apples = x

And cost of Oranges =y

Let 6 pounds of apples and 3 pounds of oranges cost 24 dollars be represented as

6 x + 3y= 24----- equation 1

Also, Let 5 pounds of apples and 4 pounds of oranges cost 23 dollars be represented as

5x+ 4y= 23----- equation 2

Step 2

6 x + 3y= 24----- equation 1

5x+ 4y= 23----- equation 2

Using substitution method to solve the equation

6 x + 3y= 24

24-6x=3y

y= 24-6x/3 = 8-2x

Y= 8-2x

Substituting the value of y= 8-2x  into equation 2

5x+ 4( 8-2x)= 23

5x+ 32 -8x= 23

32-23= 8x-5x

9=3x

x=9/3

x=3

Putting the value of x= 3 in equation 1 and solving to find y

6 x + 3y= 24

6(3) +3y= 24

18+3y=24

3y= 24-18

3y=6

y=6/3= 2

Therefore the cost of each pound of apple= $3

And cost of each pound of orange =$2

8 0
3 years ago
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