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beks73 [17]
3 years ago
10

2r-7=-1. Help please thanks

Mathematics
1 answer:
UkoKoshka [18]3 years ago
6 0

Answer:

-3

Step-by-step explanation:

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Sandeep has twice as much as sonia. together they have rs 150. how much money does sonia have.
Nimfa-mama [501]

It says Sandeep has twice as much as Sonia. Thus, let Sandeep's amount be 2x and Sonia's amount be x.

Now, together they have 150.

Thus, the equation;

x+2x=150

Now let's solve the equation;

3x=150

x=150/3

x=50

Thus, Sonia has 50

6 0
3 years ago
A set of sofa prices are normally distributed with a mean of 2500 dollars and a standard deviation of 200 dollars.
blagie [28]

We have been given that a of sofa prices are normally distributed with a mean of 2500 dollars and a standard deviation of 200 dollars.  A leather sofa has a price of 2410 dollars. We are asked to find the proportion of sofa prices that are higher than the price of the leather sofa.

First of all, we will find the z-score corresponding to sample score 2410.

z=\frac{x-\mu}{\sigma}

z=\frac{2410-2500}{200}

z=\frac{-90}{200}

z=-0.45

Now we need to find area under normal curve that is greater than z-score of -0.45 that is P(z>-0.45).

Using formula P(z>a)=1-P(z, we will get:

P(z>-0.45)=1-P(z

Now we will find area under curve using normal distribution table.

P(z>-0.45)=1-0.32636

P(z>-0.45)=0.67364

Upon rounding to 4 decimal places, we will get:

P(z>-0.45)\approx 0.6736

Therefore, approximately 0.6736 of sofa prices are higher than the price of the leather sofa.

8 0
2 years ago
Guys please this is my second time posting this I really need help. And if you answer this you can answer my other same question
spayn [35]

Answer: F and H I think are vertical

Step-by-step explanation:

I'm sorry i couldn't help you

4 0
3 years ago
Margo borrows $1900, agreeing to pay it back with 4% annual interest after 9 months. How much interest will she pay?
lana66690 [7]

1900*4%

1900*0.04

76 (interest for a year)

76*3/4 (3/4 because 9 months is 3/4 of a year)

57 (9 months interest)

Margo will pay $57 in interest  



5 0
3 years ago
What is the difference of the two polynomials?
yawa3891 [41]
You subtract the like terms, don't forget to distribute the subtraction sign, its 7x2+5x
3 0
3 years ago
Read 2 more answers
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