2 years ago

Which trinomial is factored? (help, it's a timed test and i've only got 24 minutes left!)

Mathematics

1 answer:

ozzi2 years ago

6 0

Answer:

X^2 +x -6 or the last option

Step-by-step explanation:

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Item 8 Solve for x. Use the quadratic formula. 2x2−5x−9=0 Enter the solutions, in simplified radical form, in the boxes.

Lubov Fominskaja [6]

Answer:

5+√97/4

Also 5-√97/4

Step-by-step explanation:

The Quadratic formula is x=-b+-√b^2-4ac/2a

This means that we should plug the values for A B AND C into the formula

We can work out that

A = 2

B=-5

C=-9

Once we have put these into the formula we get

5+√97/4 (all over 4) aka 3.71

Also 5-√97/4 (all over 4) aka -1.21

7 0

2 years ago

Read 2 more answers

A hemisphere has a diameter of 26 centimeters. What is the volume of a sphere with the same radius?

salantis [7]

$r= \frac{d}{2}= \frac{26}{2} \;\Rightarrow r=13\,cm \\ \\ 
V= \frac{4}{3} \pi r^3 \\ \\ 
V= \frac{4}{3} \pi \,(13)^3 \\ \\ 
V= \dfrac{4\cdot 2197}{3} \pi \\ \\ 
V= \frac{8788}{3} \pi\approx 9202,77\,cm^3$

4 0

2 years ago

00:00

Furkat [3]

Answer:

-2

Step-by-step explanation:

Subtracting a negative number is the same as adding it, so this is basically just negative 8 plus 6, which is -2. Don't know who was right though, you kinda left that part of the question out.

5 0

2 years ago

you can use the expression 5n to determine the amount of money you have in cents, when you have n nickels. Find the amount of mo

Anni [7]

Answer:

90 cents

Step-by-step explanation:

Find how much money you have by plugging in 18 as n into the expression:

5(18)

Multiply:

= 90

So, when you have 18 nickels, you have 90 cents

8 0

2 years ago

What is the slope of the line that passes through the points (3, -2) and (9, -2)?

Step2247 [10]

Answer:

0 or 0/6

Step-by-step explanation:

3+6=9

-2+0=-2

0/6=0

6 0

2 years ago