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3 years ago

Factor the expression. 2x^2-7x-15

Mathematics

1 answer:

lutik1710 [3]3 years ago

3 0

Answer:

Factor by grouping

(2x+3) (x-5)

Step-by-step explanation:

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What is the value of (0.3)4 ?

Alex_Xolod [135]

It's multiplication. Simply multiply 0.3 by 4. How multiplying dedcimals works is that we forgett the decimal until later. So, first we have 3 times 4. What's that? 12. And how many numbers did we have after the decimal? One. So, we hop over one decimal space to receave the answer 1.2. I hope I helped!!!

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3 years ago

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A street magician asks a passerby to draw one card from a standard deck, remember it, and then replace it. The magician then shu

Romashka-Z-Leto [24]

Answer:

P( At least one of the two cards was a heart)=7/16

Step-by-step explanation:

The solution to this question can be found in two ways.

First way: Since total number of heart in a deck are four,

Probability that neither of two cards had a heart is that at both times the card drawn was not a heart, since it is an independent event, thus probability both were not heart= $\frac{3}{4}$ × $\frac{3}{4}$

= $\frac{9}{16}$

Thus, Probability that at least one of the two cards was a heart= 1- P( Neither of two cards had a heart= 1- $\frac{9}{16}$

= $\frac{7}{16}$

Second way:

Probability that first card drawn is a heart and the second one is not a heart= $\frac{1}{4}$ × $\frac{3}{4}$

= $\frac{3}{16}$

Probability that the first card drawn is not a heart and the second one is a heart= $\frac{3}{4}$ × $\frac{1}{4}$

= $\frac{3}{16}$

Probability that both cards drawn are hearts= $\frac{1}{4}$ × $\frac{1}{4}$

= $\frac{1}{16}$

Adding all these probabilities, we have the probability that at least one of the card drawn was heart= $\frac{7}{16}$

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3 years ago

What is this pleAse? Im dumb asfk

erma4kov [3.2K]

Answer: A the mean of plot b is greater than plot a

plot a=7 and plot b= 11

Step-by-step explanation: when solving the mean you're adding all the numbers and then divide the total by the amount of numbers there are so add all the numbers within the lines on the plot

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2 years ago