1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Rzqust [24]
2 years ago
8

Need help I forgot how to do this ​

Mathematics
1 answer:
Marat540 [252]2 years ago
8 0

Answer:

A.

Step-by-step explanation:

you have to find the discriminant

b²-4ac for each equation

if discriminant < 0 no real solutions because will be negative under the squareroot whhan you try to find the roots

if discriminant = 0 there is only one solution

if discriminant > 0 two real solutions

for your given problems

A. discriminant =(-2)²-4*2*15 will be negative

You might be interested in
-6 3/5 - (-7 4/15) + 2 1/5
Ilya [14]

Answer:2.87

Step-by-step explanation:

3 0
2 years ago
Loneliness is the "best" anyone wanna ch.at like actually ch.at without just leaving me hanging there
Westkost [7]

Answer:

sure lets talk im bor ed

Step-by-step explanation:

5 0
2 years ago
Select the correct answer. Simplify the following expression. 3x(4x − 3) please help meh
Natalija [7]

Answer:

12x² - 9x

Step-by-step explanation:

Simplify the expression. Distribute 3x to all terms within the parenthesis. Multiply:

3x * 4x = 12x²

3x * -3 = -9x

12x² - 9x is your answer.

~

4 0
2 years ago
ASAP
artcher [175]

Answer:

9

Step-by-step explanation:

  • The vertical distance means you are moving directly up or directly down
  • So which axis is vertical? The y axis right?
  • So what is difference between each y coordinate?
  • distance=|y_2-y_1|=|3-(-6)|=|9|=9
  • The upstanding braces you see mean magnitude or absolute value
  • It prevent the answer from being negative in short. because distance can't be negative
7 0
2 years ago
Four cups of a salad blend containing 40% spinach is mixed with an unknown amount of a salad blend containing 55% spinach. the r
gizmo_the_mogwai [7]

Answer:

12 cups of salad are in the resulting mixture.

Step-by-step explanation:

Four cups of a salad blend have 40% spinach,

So the amount of spinach is,

=4\times \dfrac{40}{100}

Let x amount of salad blend is mixed with 55% spinach.

So the amount of spinach is,

=x\times \dfrac{55}{100}

As both the cups were mixed, so the net amount will be (4+x) cups.

The result has 50% spinach, so the amount of spinach is,

=(4+x)\times \dfrac{50}{100}

As the amount of spinach is same, so

\Rightarrow (4+x)\times \dfrac{50}{100}=4\times \dfrac{40}{100}+x\times \dfrac{55}{100}

\Rightarrow \dfrac{50(4+x)}{100}=\dfrac{160+55x}{100}

\Rightarrow 50(4+x)=160+55x

\Rightarrow 200+50x=160+55x

\Rightarrow 55x-50x=200-160

\Rightarrow 50x=40

\Rightarrow x=8

So, total amounts of mixture will be 4+8=12 cups.

4 0
3 years ago
Read 2 more answers
Other questions:
  • David is filling five 3/4quart bottles with a sports drinks.His measuring cup only holds 1/4 quart. How many times will David ne
    7·1 answer
  • How do u solve <br>3 (x+8) - 3x ?
    7·2 answers
  • What is the perimeter of a square with side length 2x-3
    14·2 answers
  • The volume of a cube can be found by using the formula V equals as s to the 3rd power were s represents the length of each side
    5·1 answer
  • -9=3x+6 what is the value of x?
    11·2 answers
  • The point-slope form of a line that has a slope of –2 and passes through point (5, –2) is shown below.
    8·2 answers
  • Sarah had (x) dollars. Rachel had four times as much as Sarah. Addie had 10 dollars less than Sarah. How much money did they hav
    11·1 answer
  • What is the value of x?​
    13·1 answer
  • A triangle has a base of x^1/2
    5·1 answer
  • Pls answer this question plssss
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!