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vfiekz [6]
4 years ago
15

Plz help me get the answer to these

Mathematics
2 answers:
Pavlova-9 [17]4 years ago
8 0

Remove the brackets

-5a + 9b + 7a               combine -5a and 7a

7a - 5a + 9b

2a + 9b                        Answer

Don't go any further. There is nothing else to do. These are unlike terms and cannot be reduced or combined.

Colt1911 [192]4 years ago
4 0

Step-by-step explanation:

(-5a+9b)+7a\qquad\text{combine like terms}\\\\=(-5a+7a)+9b\\\\=2a+9b

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Suppose the probability of a false positive result on a mammogram is 4%. Suppose that the probability of a false negative result
Mariulka [41]

Answer:

0.0049 = 0.49% probability that she actually has breast cancer

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

P(B|A) = \frac{P(A \cap B)}{P(A)}

In which

P(B|A) is the probability of event B happening, given that A happened.

P(A \cap B) is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: Positive test result

Event B: Breast cancer

Probability of a positive test result:

4% of (1 - 0.0002)

98% of 0.0002

So

P(A) = 0.04*(1 - 0.0002) + 0.98*0.0002 = 0.040188

Having breast cancer and testing positive.

98% of 0.0002

So

P(A \cap B) = 0.98*0.0002 = 0.000196

What is the probability that she actually has breast cancer?

P(B|A) = \frac{0.000196}{0.040188} = 0.0049

0.0049 = 0.49% probability that she actually has breast cancer

8 0
3 years ago
Given
babymother [125]

Answer:

f(x) - g(x) = -x⁸ + 8x³ + 5x² - 13

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Equality Properties

<u>Algebra I</u>

  • Combining like terms

Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = -5x⁹ - x⁸ + 3x³ - 8

g(x) = -5x⁹ - 5x³ - 5x² + 5

<u>Step 2: Find f(x) - g(x)</u>

  1. Substitute:               f(x) - g(x) = -5x⁹ - x⁸ + 3x³ - 8 - (-5x⁹ - 5x³ - 5x² + 5)
  2. Distribute -1:            f(x) - g(x) = -5x⁹ - x⁸ + 3x³ - 8 + 5x⁹ + 5x³ + 5x² - 5
  3. CBT (x⁹):                  f(x) - g(x) = -x⁸ + 3x³ - 8 + 5x³ + 5x² - 5
  4. CBT (x³):                  f(x) - g(x) = -x⁸ + 8x³ - 8 + 5x² - 5
  5. CBT (Z):                   f(x) - g(x) = -x⁸ + 8x³ + 5x² - 13

And we have our final answer!

8 0
3 years ago
En 2018 la empresa SAC-OLC fabrico 24000 ollas, si cada dia se fabricaron 80 ollas ¿cuantos dias no se trabajaron en la empresa?
kiruha [24]

Usando proporciones, hay que no se trabajaron en 65 dias durante el año de 2018 en la empresa SAC-OLC.

<h3>¿Qué es una proporción?</h3>

Una proporción es una fracción de la cantidad total, e los problemas pueden ser resolvidos con una regla de três.

En este problema, hay que se fabricaran 24000 ollas en el año de 2018, con una taja de 80 ollas al dia. Así, el número de dias trabajados es dado por:

n = 24000/80 = 300.

El año de 2018 tuvo 365 dias, así, el número de dias no trajados fue de:

365 - 300 = 65.

Puede-se aprender mas a cerca de proporciones es brainly.com/question/26950887

8 0
2 years ago
Louise made some trail mix he makes four 2/3 cups of popcorn one and 1/4 cups of peanuts one and 1/3 cups of razors and 3/4 cup
Fofino [41]

Answer:

Amount of trial mix each friend will get  \frac{8}{5}\ cups\ \ \ \ OR \ \ \ \ 1 \frac{3}{5}\ cups\ \ \ \ OR \ \ \ \ 1.6\ cups

Step-by-step explanation:

Given:

Number of popcorn cups = 4\frac{2}{3}

4\frac{2}{3} can be rewritten as \frac{14}{3}

Number of popcorn cups = \frac{14}{3}

Number of peanut cups = 1\frac{1}{4}

1\frac{1}{4} can be rewritten as \frac{5}{4}

Number of peanut cups = \frac{5}{4}

Number of Razors cups = 1\frac{1}{3}

1\frac{1}{3} can be rewritten as \frac{4}{3}

Number of razor cups = \frac{4}{3}

Number of Sunflower cups = \frac{3}{4}

Number of friends = 5

We need to find the amount of trail mix each friend will get;

We will first find the Total amount of trial mix;

Total amount of trial mix is equal to sum of Number of popcorn cups and Number of peanut cups and Number of Razors cups and Number of Sunflower cups.

Framing in equation form we get;

Total Amount of trial mix = \frac{14}{3}+\frac{5}{4}+\frac{4}{3}+\frac{3}{4}

Taking LCM we get;

Total Amount of trial mix = \frac{14\times 4}{3\times 4}+\frac{5\times 3}{4\times 3}+\frac{4\times 4}{3\times 4}+\frac{3\times 3}{4 \times 3}

Total Amount of trial mix =\frac{56}{12}+\frac{15}{12}+\frac{16}{12}+\frac{9}{12} = \frac{56+15+16+9}{12} = \frac{96}{12} =8

Now The amount of trail mix each friend will get will be equal to Total Amount of trial mix divided by Number of friends.

Framing in equation form we get;

Amount of trial mix each friend will get  = \frac{8}{5}\ cups = 1 \frac{3}{5}\ cups = 1.6\ cups

Hence Amount of trial mix each friend will get  \frac{8}{5}\ cups\ \ \ \ OR \ \ \ \ 1 \frac{3}{5}\ cups\ \ \ \ OR \ \ \ \ 1.6\ cups

5 0
3 years ago
Which values of P and Q result in an equation with no solutions? -60x+32=Qx+P
Elena L [17]
Q = -60 and P ≠ 32 will result in an equation with no solutions. (Both conditions must be met.)

_____
For Q = -60 and P = 32, there will be an infinite number of solutions. For any other values of Q and P, the solution is
.. x = (32 -P)/(Q +60)
4 0
3 years ago
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