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Alexxx [7]
2 years ago
12

How can i solve this?

Mathematics
2 answers:
blagie [28]2 years ago
8 0
Hello!

You can put in the x values and see if you get y

y = (-2)^2 - 2(-2) + 3

y = 4 + 4 + 3

y = 11

The only choice with this D

The answer is D where x is -2 and y is 11

Hope this helps!
laila [671]2 years ago
6 0
If you have a scientific calculator, you can go to tables and plug each one in. whichever table has an equation matching the one provided is the answer... but if you dont have a calculator you can put in one of the x for each table and replace it in the equation then see if it matches with its corresponding y
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candy that costs 31 cents per pound is mixed with candy that costs 46 cents per pound to obtain 50 pounds of candy that costs 40
photoshop1234 [79]

The amount of each type of candy (in pounds) that are mixed for the considered condition is: 20 pounds of first type of candy and 30 pounds of second type of candy.

<h3>How to form mathematical expression from the given description?</h3>

You can represent the unknown amounts by the use of variables. Follow whatever the description is and convert it one by one mathematically. For example if it is asked to increase some item by 4 , then you can add 4 in that item to increase it by 4. If something is for example, doubled, then you can multiply that thing by 2 and so on methods can be used to convert description to mathematical expressions.

For this case, we can assume the separate weights of each type of candies to be represented by variables.

Let we have:

  • x = weight (in pounds) of first type of candy whose cost is 31 cents per pound.
  • y = weight (in pounds)  of second type of candy whose cost is 46 cents per pound.

x pounds of first type of candy is mixed with y pounds of second candy.

The weight of the mixture = x + y = 50 pounds

The cost of the mixture = 40 cents per pound  = 40 \times 50 = 2000 cents

Cost of the mixture = cost of x pounds of first candy+ cost of y pounds of second candy = 31x + 46y
Thus, we get 31x + 46y =2000

Therefore, we got a system of two linear equations as:

x +y = 50\\31x + 46y =2000

From first equation, we get:

x = 50 -y

Substituting this value in second equation, we get:

31(50-y) + 46y =2000\\1550 + 15y = 2000\\15y = 450\\\\y = 450/15 = 30

Putting this value of y in equation for x, we get:

x = 50-y = 50-30 = 20

Thus, the amount of each type of candy (in pounds) that are mixed for the considered condition is: 20 pounds of first type of candy and 30 pounds of second type of candy.

Learn more about solving system of linear equations here:

brainly.com/question/13722693

4 0
1 year ago
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Find the value of y so that the line passing through the two points have the given slope (2,3) (7,y) m=-2/5
Liono4ka [1.6K]

Answer:

y = 1

Step-by-step explanation:

Find the slope of the line passing through the points (2,3) and (7,y):

m=\dfrac{y-3}{7-2}=\dfrac{y-3}{5}

The slope of the line is equal to

m=-\dfrac{2}{5},

then

\dfrac{y-3}{5}=-\dfrac{2}{5}\\ \\y-3=-2\\ \\y=-2+3\\ \\y=1

8 0
3 years ago
Identify and label each of the mathematical properties below.
vazorg [7]

Answer:

1. Commutative

2. Associative

3. Identity

4.Distributive

5. Identity

6. Associative

7. Commutative

8. Identity

9. Identity

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A line's y-intercept is 3, and its slope is 5. What is its equation in slope-intercept form?
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Format: y = mx + b
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Plug into the format
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x + 5 = 9 is the same as 9 = x + 5. This is an example of which algebraic property? Symmetric Property Distributive Property Ass
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Commutative property Is Your Answer
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