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4 years ago

I need help with my homework please answer this correctly

Mathematics

1 answer:

masya89 [10]4 years ago

8 0

The correct answer is "3".

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Rearrange then factorise x^2-5x+19=5x+3

Tema [17]

Answer:

x = ±4i or x = ±√-16

Step-by-step explanation:

x² - 5x + 19 = 5x + 3

x² + 16 = 0

x² = -16

x = ±√-16 (a negative square root is an imaginary number)

4 0

3 years ago

Suppose Diana, an educational researcher at a local university, wants to test the impact of a new Spanish course that integrates

EastWind [94]

Answer:

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3 years ago

Jane had 275 stickers, which she gave to her friends. Each friend got five more stickers than the friend before. If the first fr

Paha777 [63]

Answer:

10 friends

Step-by-step explanation:

we know that

The formula of the sum is equal to

$sum=\frac{n}{2}[2a1+(n-1)d]$

where

a1 is the first term

n is the number of terms (number of friends)

d is the common difference in the arithmetic sequence

In this problem we have

$sum=275\ stickers$

$a1=5\ stickers$

$d=5$ ----> the common difference

substitute in the formula and solve for n

$275=\frac{n}{2}[2(5)+(n-1)(5)]$

$550=n[10+5n-5]\\ \\550=10n+5n^{2} -5n\\ \\5n^{2}+5n-550=0$

Solve the quadratic equation by graphing

The solution is n=10

see the attached figure

therefore

She had 10 friends who got stickers

5 0

3 years ago

How to solve inter quartile range of the given data set? 3,9,12,15,16,18,21

s2008m [1.1K]

Answer:

Step-by-step explanation:

3,9,12,(15),16,18,21

mean (middle number) = 15

Q1 = 9.....the middle number of the numbers before the mean

Q3 = 18...the middle number of the numbers after the mean

interquartile range (IQR) = Q3 - Q1 = 18 - 9 = 9 <==

7 0

3 years ago

What is a set of equations that have the same variables?

labwork [276]

3y=4
4y=3

is that what you mean?

5 0

4 years ago

Read 2 more answers