All categories

2 years ago

MATH PROPORTIONAL QUESTION PLEASE HELP ITS FOR A TEST :(

Mathematics

2 answers:

Eva8 [605]2 years ago

7 0

Answer:

b money in maggies acc

Step-by-step explanation:

shtirl [24]2 years ago

7 0

It is the money in Maggie account

You might be interested in

Simplify the expression state any excluded values 2a^2-4a+2 --------------- 3a^2-3

chubhunter [2.5K]

Answer:

The simplified form is $\dfrac{2(x-1)}{3(x+1)}$ .

$x =1$ is the excluded value for the given expression.

Step-by-step explanation:

Given:

The expression given is:

$\dfrac{2a^2-4a+2}{3a^2-3}$

Let us simplify the numerator and denominator separately.

The numerator is given as $2a^2-4a+2$

2 is a common factor in all the three terms. So, we factor it out. This gives,

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

Now, $a^2-2a+1=(a-1)(a-1)$

Therefore, the numerator becomes $2(a-1)(a-1)$

The denominator is given as: $3a^2-3$

Factoring out 3, we get

$3(a^2-1)$

Now, $a^2-1$ is of the form $a^2-b^2=(a-b)(a+b)$

So, $a^2-1=(a-1)(a+1)$

Therefore, the denominator becomes $3(a-1)(a+1)$

Now, the given expression is simplified to:

$\frac{2a^2-4a+2}{3a^2-3}=\frac{2(x-1)(x-1)}{3(x-1)(x+1)}$

There is $(x-1)$ in the numerator and denominator. We can cancel them only if $x\ne1$ as for $x=1$ , the given expression is undefined.

Now, cancelling the like terms considering $x\ne1$ , we get:

$\dfrac{2a^2-4a+2}{3a^2-3}=\dfrac{2(x-1)}{3(x+1)}$

Therefore, the simplified form is $\dfrac{2(x-1)}{3(x+1)}$

The simplification is true only if $x\ne1$ . So, $x =1$ is the excluded value for the given expression.

8 0

3 years ago

Why is it necessary to check that n modifyingabove p with caret greater than or equals 5np≥5 and n modifyingabove q with caret g

Nookie1986 [14]

Both of these conditions must be true in order for the assumption that the binomial distribution is approximately normal. In other words, if $np \ge 5$ and $nq \ge 5$ then we can use a normal distribution to get a good estimate of the binomial distribution. If either np or nq is smaller than 5, then a normal distribution wouldn't be a good model to use.

side note: q = 1-p is the complement of probability p

4 0

3 years ago

Y = 2x - 3 x + 2y = 4

uranmaximum [27]

Answer:

x=2 , y = 1

Step-by-step explanation:

x + 2(2x-3) = 4

x+4x-6=4

5x-6=4

5x= 10

x=10/5

x=2

subs x=2 into x +2y=4

2+2y=4

2y=2

y=2/2

y=1

6 0

3 years ago

Read 2 more answers

Which of the following is a solution of x^2 - 2x = -8?

Zina [86]

X^2-2x=-8 add 1 to both sides

x^2-2x+1=-7 now the left side is a perfect square

(x-1)^2=-7 take the square root of both sides

x-1=±√-7 add 1 to both sides

x=1±√-7 which is

x=1±i√7 so

x=1+i√7 and 1-i√7

6 0

2 years ago

Lisa is standing on a dock beside a lake. She drops a rock from her hand into the lake. After the rock hits the surface of the l

Lemur [1.5K]

Answer:

5 ft 8 in or 68 in

Step-by-step explanation:

In 4 seconds the rock will be at:

2*4 = 8 in from the surface

Add 5 feet to this to get the required distance:

5 ft + 8 in = 5*12 in + 8 in = 68 in

7 0

2 years ago

Read 2 more answers