All categories

2 years ago

Evaluate y = 2x + 1 when x= -1

Mathematics

2 answers:

PolarNik [594]2 years ago

8 0

Answer:

y = -1

Step-by-step explanation:

We Know:

y = 2x + 1, and x= -1.

Substitute:

y = 2(-1) + 1

Multiply:

2 * -1 = -2

y = -2 + 1

Add:

-2 + 1 = -1

So,

y = -1.

Stolb23 [73]2 years ago

5 0

Y = 2x + 1
y = 2(-1) + 1
y= -2 + 1
y= -1

You might be interested in

What is eight out of eight as a fraction

Svetlanka [38]

Answer: one whole

Step-by-step explanation:

8/8 = one whole

3 0

2 years ago

Which expression can you use to find 16÷45?

Serga [27]

Answer:

☆<《HOPE IT WILL HELP YOU 》>☆

Step-by-step explanation:

Exprassion is 16/45--x=0

7 0

2 years ago

Read 2 more answers

(9)

Liula [17]

Step-by-step explanation:

Your question is Incomplete please edit the question

6 0

2 years ago

A store sold 28 pairs of cross-trainer shoes for a total of $2,220. Style A sold for $70 per pair and Style B sold for $90 per p

icang [17]

Answer:

Style A sold 15 pairs while Style B sold 13 pairs

Step-by-step explanation:

Let the number of Style A pairs be A.

Let the number of Style B pairs be B.

The store sold 28 pairs of cross-trainer shoes for a total of $2,220 and Style A sold for $70 per pair while Style B sold for $90 per pair.

This implies 2 things:

A + B = 28 ________________ (1)

and

(70*A) + (90*B) = 2220

=> 70A + 90B = 2220 ________(2)

We now have two simultaneous equations:

A + B = 28 ________________ (1)

70A + 90B = 2220 __________(2)

From (1):

A = 28 - B ________________ (3)

Put (3) in (2):

70(28 - B) + 90B = 2220

1960 - 70B + 90B = 2220

1960 + 20B = 2220

Collecting like terms:

20B = 2220 - 1960

20B = 260

B = 260 / 20

B = 13

Therefore:

A = 28 - 13 = 15

Style A sold 15 pairs while Style B sold 13 pairs.

8 0

2 years ago

Explain how finding 4 x 384 can help you find 4 x 5,384. Then find both products.

Serhud [2]

384
X 4 =
1536

5384
x 4 =
21536

7 0

2 years ago