Please help with math problem

Mathematics

1 answer:

Lady_Fox [76]3 years ago

7 0

try and see if it =0

Step-by-step explanation:

This deals with factoring multi-variable polynomials.

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X² + 2x - 3 = 0

tankabanditka [31]

Step-by-step explanation:

x²+2x-3=0

(x²+3x)-(x-3)=0

x(x+3)-1(x+3)=0

(x-1)(x+3)=0

x=1 or x=-3

6 0

3 years ago

Isabella is getting older and feels like she should donate her collection of stuffed animals to children who are less fortunate.

Studentka2010 [4]

Answer:

well for the cats she can do 3 for each and dogs 2 for each

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3 years ago

A family of 5 people attends a theme park. the purchase 2 adult tickets for $27.50 each and 3 student tickets for $12.50 each. i

pickupchik [31]

They should get $7.50, because you multiply the adults by two, then the children by three, and add it all together

8 0

4 years ago

Read 2 more answers

The store is selling lemons at $0.39 each. Each lemon yields about 2 tablespoons of juice. How much will it cost to buy enough l

I am Lyosha [343]

Answer: 6.24 tablespoons

Explanation: okay so if $.39 is 2 tablespoons, then you can multiply that by 8 because there are 8 tablespoons in half a cup. After you multiply that just multiply it by 2 because they are trying to make two pies. And that’s how you your answer.

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3 years ago

Assume that the empirical rule is a good model for the time it takes for all passengers to board an airplane. The mean time is 4

slamgirl [31]

Answer:

The interval that describes how long it takes for passengers to board the middle 95% of the time is between 40.16 minutes and 55.84 minutes.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 48, \sigma = 4$ .