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
svet-max [94.6K]
3 years ago
8

-7x^2+14x+21=0answer?​

Mathematics
1 answer:
scoray [572]3 years ago
6 0

Answer:

7(−x−1)(x−3)

Step-by-step explanation:

You might be interested in
Factor completely, the expression: 2x^3-2x^2-12x
muminat
2x^3-2x^2-12x=2x(x^2-x-6)=(*)\\\\------------------------------\\x^2-x-6\\\\a=1;\ b=-1;\ c=-6\\\\\Delta=(-1)^2-4\cdot1\cdot(-6)=1+24=25\\\\\sqrt\Delta=\sqrt{25}=5\\\\x_1=\frac{1-5}{2\cdot1}=\frac{-4}{2}=-2;\ x_2=\frac{1+5}{2\cdot1}=\frac{6}{2}=3\\\\x^2-x-6=(x+2)(x-3)\\\\------------------------------\\\\(*)=2x(x+2)(x-3)
8 0
3 years ago
Giovanna,Frances, and their dad each carried a ten pound bag of soil into the back yard. After putting soil in the first flower
Greeley [361]
First find the common denominator
5/8=25/40
2/5=16/40
3/4=30/40
Next you can cross multiply
25/40=x/10 pounds
16/40=x/10 pounds
30/40=x/10 pounds
First
25(10)/40= 6.25 pounds
16(10)/40= 4pounds
30(10)/40= 7.5 pounds
These are the amounts that were left in the bag

10-6.25=3.75
10-4=6
10-7.5=2.5

3.75+6+2.5= 12.25

All together they put 12.25 pounds of soil in the flower bed

3 0
3 years ago
Read 2 more answers
How to write 1/4 as a decimal
Gnom [1K]

Answer:

0.25

Step-by-step explanation:

As a decimal, 0.25

As a fraction, 1/4

As a percentage, 25%

3 0
3 years ago
Read 2 more answers
2x - 3y = 1 and x + 2y = 18​
Yuliya22 [10]

Answer:

x = 8 and y = 5

Step-by-step explanation:

2x - 3y = 1 --(1)

x + 2y = 18

x = 18 - 2y --(2)

sub (2) into (1):

2(18 - 2y) - 3y = 1

36 - 4y - 3y = 1

-7y = 1 -36

7y = 35

y = 5

x = 18 - 2(5) = 8

5 0
2 years ago
Brainly please show steps
Alex Ar [27]

Answer:

47.145

Step-by-step explanation:

formula for total surface area of a cylinder is 2×3.143×radius

7 0
2 years ago
Other questions:
  • The equation V = -2000t + 20,000 describes the value in dollars of a certain model of car after it is t years old. If a car is w
    12·2 answers
  • Represent Real-world Problems If one store is selling of a bushel of apples for $9, and another store is selling of a bushel of
    7·1 answer
  • If the ordered pair (-3,5) is a solution of 3x + 4y = k, what is the value of k?
    11·2 answers
  • Points
    13·1 answer
  • A pole breaks 16 feet has broken off 12 feet is still standing how tall was the pole before it broke
    12·1 answer
  • This rule describes how the area depends on the width, w:
    15·1 answer
  • Which expression is equivalent to 8a + 20?
    13·2 answers
  • Does Emiliano need more than 1 stick of butter or less than 1 stick of butter for the corn bread and the apple muffins?
    11·1 answer
  • SHOW WORK PLS I NEED IT ASAP
    10·2 answers
  • Consider the graph for Question #4. This represents the temperature change over a period of time on a single day.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!