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
9. Are there any outliers in the data from question #7?
Arisa [49]

Answer:

A) Yes; Week 10 is an outlier since it is the greatest data point.

8 0
2 years ago
Based on the diagram, which is a true statement?
oksian1 [2.3K]

Answer:

top god's menu back door distract 9 call scars double knot thunderous gone away gone day SKZ ALL AROUND THE WORLD

7 0
3 years ago
The volume of a cone is 3rx? cubic units and its height is x units. Which expression represents the radius of the cone's base, i
Marianna [84]

Answer:

It is given that the volume of a cone = 3\pi x^3 cubic units

Volume of cone with radius 'r' and height 'h' = \frac{1}{3}\pi r^2h

Equating the given volumes, we get

3\pi x^3=\frac{1}{3}\pi r^2h

r^2h=3 × 3x^3

r^2h=9 x^3

It is given that the height is 'x' units.

Therefore, r^2x=9x^3

r^2=9x^2

Therefore, r=3 x

So, the expression '3 x' represents the radius of the cone's base in units.

3 0
2 years ago
You are choosing a song for your dance recital. Song A has 11 beats in 10 seconds. Song B has 7 beats in 6 seconds. Which song h
shusha [124]
Song B
7/6 is greater than 11/10
3 0
3 years ago
After reading The Lord of the Rings, Francesca signs up for archery lessons. At her first lesson, she sets up her target 5 feet
N76 [4]

Answer:

3 times

Step-by-step explanation:

5x=15

Divide both sides by 5

x=3

Hope this helps

6 0
3 years ago
Read 2 more answers
Other questions:
  • If a coin is tossed and a number cube is rolled, how many times would we expect to get heads and a 4 out of 600 trials?
    12·1 answer
  • the campus shuttle arrives at the cafeteria every 8 minutes the library Shuttle arrives every four minutes if both shuttles arri
    9·1 answer
  • Write the phrase as an algebraic expression and simplify if possible
    13·1 answer
  • Use properties to find the sum of product 8×51gb
    10·1 answer
  • Evaluate 0.3y + y/x when y = 10 and z =5
    13·1 answer
  • 1. Complete the table below to solve the equation 2.5x – 10.5 = 64(0.5x).
    10·1 answer
  • Distribute and Combine<br> 3(7m + 4) + 5m
    13·2 answers
  • 12-packs of Skwunch apple juice cost $3.00 after a 40% discount. Which equation would allow you to find the original price of th
    15·2 answers
  • Find the gradient of each of these line y = 2x + 4
    11·2 answers
  • The price of shoes is $52.00. If you order them directly from the company on the internet, you can save money and the price is o
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!