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
Gnom [1K]
3 years ago
15

How do you solve the quadratic equation x2+2x-15=0

Mathematics
1 answer:
vlabodo [156]3 years ago
3 0
X = -5 and 3

You solve using the quadratic equation by using the formula below where the coefficients of each term are the letters in alphabetical order. 

\frac{-b +/-  \sqrt{b^{2} -4ac} }{2a}
You might be interested in
in a school containing 360 children, 198 are girls. What percent of the school are girls? What percent of the school are boys? H
almond37 [142]

Answer:

What percent of the school are girls? 55%

What percent of the school are boys? 45%

How many boys are there? 162

How many girls are there? 198

Step-by-step explanation:

The number of girls = 198

The percent of girls = 198/360 x 100% = 55%

The number of boys = 360-198 = 162.

The percent of boys = 162/360 x 100% = 45%.

5 0
3 years ago
Read 2 more answers
The floor of a rectangular deck has an area of 600 square feet. The floor is 20 feet wide. How long is the floor? A. 30 ft. B. 2
svetoff [14.1K]
<span>A. 30 ft
 The formula for the area of a rectangle is width x length = area. Knowing this formula, we can solve for the length by dividing the area by the width. 600 divided by 20 is 30.</span>
4 0
3 years ago
Read 2 more answers
The diagram represents a reduction of a triangle by using a scale factor of 0.8.
Alekssandra [29.7K]

Answer:

4.8 inches

Step-by-step explanation:

<em>See comment for complete question</em>

Represent the larger triangle with 1 and the smaller with 2.

So, we have:

H_1 =6\ in -- height of 1

Required

Determine H2 --- Height of 2

To do this we apply dilation formula.

Original * Scale\ Factor = New

In this case:

H_1 * Scale\ Factor = H_2

Substitute 6 for H1 and 0.8 for Scale Factor

6* 0.8 = H_2

4.8= H_2

Hence, the height of the smaller triangle is 4.8 inches

3 0
3 years ago
Please help this is timed! I’ll give brainliest.
aleksandrvk [35]

Answer:

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Caleb starting playing video games as soon as he got home from school. He played video games for 50 minutes. Then Caleb helped c
fenix001 [56]

Answer:

Caleb had gotten home at 3:55 pm

5 0
3 years ago
Read 2 more answers
Other questions:
  • write an equality relating the given side lengths. If there is not enough informations to reach a conclusion, write no conclusio
    14·1 answer
  • How does the range of g (x) = StartFraction 6 Over x EndFraction compare with the range of the parent function f (x) = StartFrac
    13·2 answers
  • Write 5.7 as a mixed number in simplist form
    13·1 answer
  • Round 48545.5607849 to the nearest ten.
    12·1 answer
  • How is the location of a point on a grid described?
    5·1 answer
  • Number of points scored in each basketball game: 28,16,38,44,21,38,35,48,33,29,37,39,18,38,42,37,32​
    14·1 answer
  • Help..................
    8·2 answers
  • What is −3x+4y=−16 in slope-intercept form?
    15·1 answer
  • Suppose the diameter of a circle is 16 units what is the circumference?
    10·2 answers
  • Jim earns $22.50,$14.75,$8.50 on three different days how much did he earn in all
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!