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Nina [5.8K]
3 years ago
9

Find the possible value or values of r in the quadratic equation r^2-7r-8=0

Mathematics
1 answer:
tester [92]3 years ago
6 0
I hope this helps you

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What is the slope of the line that passes through the points (-2, 7) and (2,-5)?
Deffense [45]

Answer:

Denote that line: y = ax + b

Line passes (-2, 7) and (2,-5):

=> -2a + b =7

=>  2a + b = -5

Add both side of above equations:

=> 2b = 2

=> b = 1

=> a = (-5 - 1)/2 = -3

=> Slope a = -3

Hope this helps!

:)

4 0
2 years ago
Fill in the chart on paper than list the coefficient of x^2 term.
slamgirl [31]
I am assuming you're doing a Punnet square, so you multiply each one. So on the top left box, it is -45x^2, the top right is 9x, bottom left is 35x, and bottom right is -7. 
8 0
3 years ago
PLEASE HELP I DONT KNOW
alekssr [168]

Answer:

28π is the circumference

Step-by-step explanation:

7 0
3 years ago
The fastest NASCAR qualifying speed is 313 feet per second. How many miles per hour is that?
Semmy [17]

Answer:

213.41 mph.

Step-by-step explanation:

Multiply by 3600 ( seconds in an hour) and divide by 5280 (feet in a mile).

= 213.41 mph.

3 0
3 years ago
Luis trabaja en Canadá por cada 15 dólares que gana envía 8 a su
Sav [38]

Usando proporciones, hay que Luis enviará 160 dólares a su familia.

<h3>¿Qué es una proporción?</h3>

Una proporción es una fracción de la cantidad total, y puede ser encontrada por intermedio de una regla de tres.

En este problema, la regla de tres es dada por:

15 dólares - 8 envíados

300 dólares - n envíados

Aplicando multiplicación cruzada:

15n = 300 x 8

n = (300 x 8)/15

n = 160

Luis enviará 160 dólares a su familia.

Puede-se aprender mas a cerca de proporciones es brainly.com/question/26425852

7 0
2 years ago
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