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4 years ago

(-3x)-7+2x+9=5 what does X equal to

Mathematics

1 answer:

yKpoI14uk [10]4 years ago

8 0

Answer:

Step-by-step explanation:

-3x -7 +2x + 9 = 5

-x + 2 = 5 (you are combining like terms here)

-x = 3

x = -3

Hope this helps :)

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If you ate 56 hotdogs in 7 minutes how much would you eat per minute

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Answer:

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Step-by-step explanation:

$8*7=56\\$

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5 hundreds 5 tens ×10

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) 10 counters in a bag. 4 red, 3 green, 2 pink and 1 blue. Ella picks a counter at random from the bag, notes the colour and the

Fofino [41]

Answer:

a) i) The probability depends on the total number of counters not on the number of colors.

ii) There are 10 number of counters not 4

b) $\dfrac{3}{10}$

Step-by-step explanation:

Given that:

Total number of counters in a bag = 10

Number of red counters = 4

Number of green counters = 3

Number of pink counters = 2

Number of blue counters = 1

a) Ella writes: "There are four colors, so the probability of selecting a green is $\frac{1}4 + \frac{1}4 = \frac{2}4$ , so the probability is $\frac{1}2$ "

Ella has considered the total type of counters here, which is 4.

But Ella must have considered total number of counters which is 10.

i) The probability depends on the total number of counters not on the number of colors.

ii) There are 10 number of counters not 4

b) There are 4 colors in the bag.

Formula for probability of an event E can be observed as:

$P(E) = \dfrac{\text{Number of favorable cases}}{\text {Total number of cases}}$

To select 2 counters of the same color:

$P(2\ red) = \dfrac{4}{10}\times \dfrac{4}{10} = \dfrac{16}{100}$

$P(2\ green) = \dfrac{3}{10}\times \dfrac{3}{10} = \dfrac{9}{100}$

$P(2\ pink) = \dfrac{2}{10}\times \dfrac{2}{10} = \dfrac{4}{100}$

$P(2\ blue) = \dfrac{1}{10}\times \dfrac{1}{10} = \dfrac{1}{100}$

The required probability will be the sum of all 4 above probabilities:

$P(2\ of\ same\ color) = \dfrac{30}{100} = \bold{\dfrac{3}{10} }$

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3 years ago

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6x^2 is the correct answer to the problem.

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