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
Blizzard [7]
3 years ago
11

What is (4x+3)(x-7)=90

Mathematics
2 answers:
gregori [183]3 years ago
8 0
(4x+3)(x-7)=90\\
Distribute\\
4x^{2}-28x+3x-21=90\\
4x^{2}-25x-21=90\\
4x^{2}-25x-101=0\\
\\
101\ is\ a\ prime\ number,\ so\ use\ the\ quadratic\ equation.\\
x= \frac{-b+-\sqrt{b^{2}-4ac}}{2a} \\
 \frac{-(-25)+-\sqrt{(-25)^{2}-4*4*(-101)}}{2*4} \\
 \frac{25+-\sqrt{625+1616}}{8} \\
x= \frac{25+-\sqrt{2241}}{8} \\
So\ x= \frac{25+\sqrt{2241}}{8}\ and x= \frac{25-\sqrt{2241}}{8} \\
These\ come\ out\ to\ be\ x=9.0424... \ and\ x=-2.7924...
Ivan3 years ago
6 0
It would be 16 i say
You might be interested in
Anyone good at math .,.?
vlada-n [284]

Answer:

A. Rectangle.

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
i five man take 45 hours to build a wall how long will it take 9 men working at the same pace to build this wall​
Zarrin [17]

Answer:

81 hours

Step-by-step explanation:

Let x be the time are needed

45:5 = x:9

5x = 45×9

5x = 405

x = 81

4 0
3 years ago
Please help lol I forgot how to do this
natka813 [3]

Answer: C

Step-by-step explanation:because he will need to write an inequity to represent the total number of hours he can work each week . SO HE can see if he is making more then 120$ per week . No problem thanks me later

4 0
2 years ago
Read 2 more answers
What is 2/3+4/5 simplified ?
11Alexandr11 [23.1K]

Answer:

\frac{2}{3}  +  \frac{4}{5}

=  \frac{10 + 12}{15}

=  \frac{22}{15}

= 1 \frac{7}{15}

6 0
3 years ago
Read 2 more answers
6n+7n<br> whats the answer
sergeinik [125]
13n





ahaha , it’s that easy !!






have a good day <3
3 0
2 years ago
Read 2 more answers
Other questions:
  • The length of one side of a square is x-5. what is the area of the square
    11·2 answers
  • The total revenue R (in dollars) is directly proportional to the number of units sold x. When 500 units are sold, the total reve
    7·1 answer
  • Plot 3/8 number line
    9·1 answer
  • What is 2 1/2 divided 1/4
    9·2 answers
  • Four speed skaters, Marco
    12·2 answers
  • The exponent of 12 in 100! is
    6·1 answer
  • Jose has $20 more than Sarah. Their combined mobey totals $90. Write and solve an algebric model to determine the amount of mone
    6·2 answers
  • I WILL GIVE 69 POINTS AND BRAINLIEST TO WHOEVER ANSWERS ALL 5 QUESTIONS
    14·2 answers
  • #3 need help asap will give brainly
    5·1 answer
  • Square root y is a rational between square root<br><br> 33 and square root 50 find y​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!