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meriva
2 years ago
9

Theo had 2 blocks. Then he got 2 more blocks from Ray and some more blocks from Lia. Now Theo has 12 blocks.

Mathematics
2 answers:
tangare [24]2 years ago
8 0

Answer:

2+2+b=12

Step-by-step explanation:

You already know the exact amount you have and then given 2 more, then the next person gave you more blocks but you dont know the amount, which would be the variable b and the total is 12

Oliga [24]2 years ago
6 0

Answer:

The answer is D: 2+2+b=12

Step-by-step explanation:

Hope this helps!

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If x-2y=0 and 3x + y =7 what is the value of x
Agata [3.3K]

Answer:

x=2

Step-by-step explanation:

If 3x + y = 7, then y= 7 - 3x.

Substitute in x - 2y = 0

So:

x - 2(7-3x)=0

x-14+6x=0

7x=14

x=2

6 0
3 years ago
A scientist changes the temperature of a solution at a rate of
Elan Coil [88]

Answer:

11 minutes

Step-by-step explanation:

I may be missing something. This is too simple.

88 degree change at 8 degrees per minute = 11 minutes.

5 0
3 years ago
Given the function f(x)=x^2+2x+1, find a f(−7)
tatuchka [14]

Answer:

36

Step-by-step explanation:

f(x)=x^2+2x+1

Let x = -7

f(-7)=(-7)^2+2*-7+1

     = 49 -14+1

     = 36

3 0
3 years ago
Which expression is equivalent to 200?<br> O 2 /10<br> O 10/2<br> O 10/20<br> O 100/13
creativ13 [48]

Answer:

10/20

Step-by-step explanation:

10 times 20 is 200 which would give you 10/20

hope I did this right

6 0
2 years ago
Pearl's Biking Company manufactures and sells bikes. Each bike costs £40 to make, and the company's fixed costs are £5000. In ad
____ [38]

Answer:

R(x) =300·x - 2·x²

C(x) = £5000 + £40 × x

The break even points are 23.47 and 106.53 or 23 and 107 bikes

Step-by-step explanation:

Given that the price function P(x) = 300 -2·x

Cost per bike = £40

The revenue function R(x) is given by  bike price × total number of bikes manufactured and sold

∴ R(x)  = P(x)×x = (300 - 2·x)×x = 300·x - 2·x²

The company's cost function, C(x) is Fixed cost + cost to produce each bike × total number of bikes produced

∴ C(x) = £5000 + £40 × x

The break even point is given by the relation;

Total revenue - total cost = 0

That is, break even point is R(x) - C(x) = 0

300·x - 2·x² - (5000 + 40·x) = 0

-2·x²+260·x-5000 = 0 or 2·x²- 260·x + 5000 = 0

Factorizing, we have;

(x - (65 -5√69))(x - (65 +5√69))

Solving gives x = 23.47 or 106.53

Therefore, the break even points are 23.47 and 106.53.

That is the company is profitable when they produce less than 23 bikes or more than 107 bikes.

3 0
3 years ago
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