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3 years ago

Please help asap 50 pts

Mathematics

2 answers:

goldenfox [79]3 years ago

7 0

Is B (x=2) because y=5x^2 then x=2 then 2^2 because x^2 and it comes out 4.then 5x4=20 then 10 is wrong because it's right 20

mart [117]3 years ago

4 0

Substitute the x value for the x in the function. In B when you put two in you should get

2^2= 4
4 x 5=20

So y should be 20, but in the table y is 10

Therefore, B is wrong

* do the same thing for all the options to double check

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Solve for t <br><br> 2t^2-14t+3=3

Dvinal [7]

Answer:

t=7,t=0

Step-by-step explanation:

2t^2-14t+3=3

Subtract 3 from both sides

2t^2 - 14t +3 - 3 = 3-3

Simpilfy

2t^2 -14t = 0

7 0

3 years ago

Y=2x+9 y=4x-9 Solve the system of equations.

Deffense [45]

Answer:

Your solution is (9, 27) or x = 9, y = 27

Step-by-step explanation:

y = 2x + 9

y = 4x - 9

We can see that both of these equations equal y, so we can set them equal to each other.

2x + 9 = 4x - 9

Add 9 to both sides.

2x + 18 = 4x

Subtract 2x from both sides.

18 = 2x

Divide both sides by 2.

9 = x

Now we want to find y. To do this, plug x = 9 back into one of the original equations.

y = 2(9) + 9

Multiply.

y = 18 + 9

Add.

y = 27

Your solution is (9, 27)

Check your answer by plugging x = 9 and y = 27 back into the original equations.

y = 2x + 9

27 = 2(9) + 9

27 = 18 + 9

27 = 27

y = 4x - 9

27 = 4(9) - 9

27 = 36 - 9

27 = 27

Your answer is correct.

Hope this helps!

3 0

3 years ago

Read 2 more answers

Can someone please help me I am a no brain and very dum

Doss [256]

200$ because that’s the percent

6 0

3 years ago

12. Translate “the sum of 6 and the product of 8 and x” into a mathematical expression

Shalnov [3]

Answer:

6+8x

Step-by-step explanation:

4 0

3 years ago

Kim and Sam were each given the same pair of numbers. Sam's description of the two numbers was: The larger number is 3 more than

irina1246 [14]

Answer:

Sam's description = $3x+3$ , Kim's description = $5x-7$

Step-by-step explanation:

Given:

Kim and Sam were each given the same pair of numbers.

Sam's description of the two numbers was:

The larger number is 3 more than three times the smaller number.

Kim's description of the two numbers was:

Five times the smaller number decreased by 7 is the larger number.

Question asked:

Which equation represents the situation?

<u>Solution:</u>

Let smaller number = $x$

According to Sam's description of the two numbers, the equation will be:-

Larger number = 3 more than three times the smaller number

= $3x+3\ (eq1)$

According to Kim's description of the two numbers was, the equation will be:-

Larger number = Five times decreased by 7

= $5x-7\ (eq2)$

By equating both equation:-

$5x-7=3x+3\\ \\ Subtracting\ both\ sides\ by \ 3x\\ \\ 5x-3x-7=3x-3x+3\\ \\ 2x-7=3\\ \\ Adding\ both\ sides\ by\ 7\\ \\ 2x-7+7=3+7\\ \\ 2x=10\\ \\ Dividing\ both\ sides\ by\ 2\\ \\ x=5$

Smaller number = $x$ = 5

Larger number = $3\times5+3=15+3=18$

Therefore, equations represents the situation are $3x+3$ and $5x-7$

8 0

3 years ago