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erma4kov [3.2K]

2 years ago

6

Which of the expressions are equivalent to the one below? Check all that

1 answer:

lutik1710 [3]2 years ago

6 0

Answer:

Only B,

Step-by-step explanation:

Because it is all addition it does not mater what order they are in,..

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What do I do next? I’m confused.

Nina [5.8K]

15 because it’s 3 times the actual amount

6 0

2 years ago

Due today helpppppppppp

Rudiy27

Answer:

Step-by-step explanation:

c and d

7 0

3 years ago

Read 2 more answers

Write a quadratic function, in standard form, that fits the set of points. Solve it as a system of three equations. (-4, 9), (0,

Tresset [83]

Answer:

$\boxed{y=2x^2+4x-7}$

Step-by-step explanation:

Let the quadratic function be

$y=ax^2+bx+c$

We substitute $(-4,9)$ into the equation to obtain;

$9=a(-4)^2+b(-4)+c$

$\Rightarrow 9=16a-4b+c---(1)$

We substitute $(0,-7)$ to obtain;

$-7=a(0)^2+b(0)^2+c$

$\Rightarrow c=-7---(2)$

We finally substitute $(1,-1)$ to obtain;

$-1=a(1)^2+b(1)^2+c$

$\Rightarrow -1=a+b+c---(3)$

We put equation (2) into equation (1) to get;

$9=16a-4b-7$

$16a-4b=16$

$\Rightarrow 4a-b=4---(4)$

$\Rightarrow -1=a+b-7$

$\Rightarrow a+b=6---(5)$

We add equation (4) and (5) to get;

$4a+a=6+4$

$\Rightarrow 5a=10$

$\Rightarrow a=2$

We put $a=2$ into equation (5) to get;

$2+b=6$

$\Rightarrow b=6-2$

$\Rightarrow b=4$

The reqiured quadratic function is

$y=2x^2+4x-7$

7 0

2 years ago

Select the correct answer.

jenyasd209 [6]

Answer:

I think it is B it is my guss

4 0

2 years ago

Brielle’s piggy bank has all nickels and dimes. The total value of the money in her piggy bank is $7.80. If Brielle

deff fn [24]

66*0.5=3.30

7.80-3.30=4.50

4.50/0.10=45

ANSWER: 45 dimes

8 0

3 years ago