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3 years ago

PLEASE EXPLAIN THIS TO ME

Mathematics

1 answer:

zvonat [6]3 years ago

5 0

it is y cause i just did that with my student

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Multiply 3.54 × 25.8 =

Airida [17]

91.3 Is the rounded answer

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3 years ago

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Mark incorrectly solved the inequality -4(5/2+3/2x) > 8. His work is shown. Which step shows an error based on the inequality

aliya0001 [1]

Answer : The incorrect step is, (A) step 1: -10 + 6x > 8

Step-by-step explanation :

The given expression is:

$-4(\frac{5}{2}+\frac{3}{2}x)>8$

Now solving this expression step by step.

First -4 distributed over parentheses.

$(-4\times \frac{5}{2})+(-4\times \frac{3}{2}x)>8$

Now solving bracket term, we get:

$-10-6x>8$

Now taking like terms together, we get:

$-6x>8+10$

$-6x>18$

$-x>3$

Now multiplying this expression by (-1), we get:

$x>-3$

Thus, the incorrect step is, (A) step 1: -10 + 6x > 8

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3 years ago

-6 - (2x + 7) = -2(x +6) -1

sdas [7]

Answer:

Infinite solutions

Step-by-step explanation:

You can put in any number for x and the 2 sides of the equation will equal each other.

5 0

2 years ago

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9x^2 + 6x -1 =0 (Round to the nearest hundredth)

hodyreva [135]

9x^2 + 6x = 1
Factor out 3x
3x (3x +2)=1
Use the zero product property
3x=1
3x+2 = 1
X= +1/3 and -1/3

7 0

3 years ago

A medical testing laboratory saves money by combining blood samples for tests, so that only one test is conducted for several pe

Dovator [93]

The probability is 0.0334.

We will first find the probability that none of the 30 people sampled are infected. Since the probability of one person being infected is 0.00114, the probability that someone is not infected is 1-0.00114 = 0.99886. The probability that none of the 30 people are infected would be (0.99886)^30 = 0.966359. We subtract this from one to find the probability that at least one person is infected:
1 - 0.966359 = 0.0334.

6 0

3 years ago