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3 years ago

I have to finish this packet for tomorrow and I need help with this question

Mathematics

1 answer:

timofeeve [1]3 years ago

3 0

The answer is b

If you go backwards on a number line, you are subtracting--which is the same as adding a negative.

First you go backwards 3 numbers, and then to get to -7, you went down (decreased) by 4 more, or subtracted 4 (added a negative 4)

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Have the conditions for inference been met?

alekssr [168]

Answer: the answer is A

Step-by-step explanation: because the original question does not state that the swimmer “randomly selected” the members. It only says the swimmer “selects” 10 members. Therefore, it is A (The sample is not random)

youre welcome

5 0

2 years ago

Rounded to the nearest hundredth, what is the positive solution to the quadratic equation 0 = 2x2 + 3x – 8? Quadratic formula: x

OleMash [197]

ANSWER

$x=1.39$ to the nearest hundredth.

EXPLANATION

We have the equation,

$0=2x^2+3x-8$

Which can be rewritten as

$2x^2+3x-8=0$

The question demands the use of the quadratic formula.

Comparing this to the general quadratic equation;

$ax^2+bx+c=0$

$a=2,b=3,c=-8$

The quadratic formula is given by;

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

We now substitute all the values in to the formula;

$x=\frac{-3\pm\sqrt{(3)^2-4(2)(-8)}}{2(2)}$

We simplify to obtain;

$x=\frac{-3\pm\sqrt{9+64}}{4}$

$x=\frac{-3\pm\sqrt{73}}{4}$

We now split the plus or minus sign to obtain;

$x=\frac{-3-\sqrt{73}}{4}$

This implies that;

$x=-2.89$

$x=\frac{-3+\sqrt{73}}{4}$

This will evaluate to;

$x=1.39$

Hence, the positive solution rounded to the nearest hundredth is

$x \approx 1.39$

6 0

3 years ago

Read 3 more answers

Why is the square root of a perfect square always rational?

vova2212 [387]

Basically because you can break any square root of non-perfect square into the square root of prime factors.

6 0

3 years ago

Simplify<br>5/2y-1 - 6/3y-1

Kipish [7]

Answer:

Step-by-step explanation:

First Group like terms:

$5/2y-6/3y-1-1$

Add similar elements: $5/2y-6/3y=1/2y$

$1/2y-1-1$

$1/2y=y/2$

$=y/2-1-1$

$=y/2-2$

6 0

2 years ago

Factor the following:<br><br> x2−6x+5

lukranit [14]

Answer:

the 6x element as there is no solution in integers.

Step-by-step explanation:

8 0

3 years ago