3 years ago

How to do this question?

Mathematics

1 answer:

ASHA 777 [7]3 years ago

6 0

Answer:

Step-by-step explanation:

2x² - 5y + 7 when x = 2 and y = -5

2(2)² - 5(-5) + 7

= 2(4) -5(-5) + 7

= 8 + 25 + 7

= 40

You might be interested in

How many terms are in the following expression?<br> 3x + 7 - (-4b) + 2x + (-b) + 5

Andrews [41]

Answer:

-5b+5x+12

Step-by-step explanation:

5 0

2 years ago

In an article in Marketing Science, Silk and Berndt investigate the output of advertising agencies. They describe ad agency outp

fredd [130]

Answer: (7.27%, 7.55%)

Step-by-step explanation:

As per given , we have

Sample size : n= 392

Sample mean : $\overline{x}=7.41\%$

$\sigma=1.43\%$

Critical two-tailed z-value for 95% confidence = $z_{\alpha/2}=1.96$

Required confidence interval would be :

$7.41\%\pm (1.96)\dfrac{1.43\%}{\sqrt{392}}\\\\=7.41\%\pm 0.14\%\\\\=(7.27\%, 7.55\%)$

Hence, the required 95% confidence interval for the mean percentage share of billing volume from network television for the population of all U.S. advertising agencies : (7.27%, 7.55%)

7 0

3 years ago

How can bar diagrams be used to model numerical expressions

vesna_86 [32]

A bar diagram can be used to represent algebraic expressions or to give examples.

5 0

2 years ago

Read 2 more answers

Rita has deposited $1000 in a bank account. At the end of each year, the bank posts interest to her account in the amount of 5%

Ierofanga [76]

$1,040 is how much you would have remaining at the end if that's what you are looking for.

3 0

3 years ago

Mason will use a 1/3 gallon pitcher to fill an empty 3/4 gallon water jug. How much water will he need in order to completely fi

kirza4 [7]

Answer:

It's 1/2 I found this out by subtracting 3/4 - 1/3= 5/12 and if you put that into a decimal it would be .41. So that 1/4= .25 and 1/2= .50. You could figure out that it’s closed to 1/2.

3 0

2 years ago

Read 2 more answers