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
Dima020 [189]
4 years ago
10

Josephine solved a quadratic equation. Her work is shown below.

Mathematics
1 answer:
mariarad [96]4 years ago
7 0

Answer:

Step-by-step explanation:

hello :

5(x + 7)² = 245

(x + 7)² = 49

x=0 is solution but you have other solution -14 because :(-14+7)² = (-7)² =49

here is an solution Step-by-step :

(x + 7)² = 49  means : (x + 7)² = 7²

(x + 7)² - 7²=0   use identity : a²-b² = (a-b)(a+b)

a=x+7  and b= 7

(x+7-7)(x+7+7) = 0

x(x+14)=0

x=0 or x+14=0

so : x=0 or x= -14

You might be interested in
Let f(x)=-2x+7 and g(x)=x^2+9 find f(5)+g(5)
trapecia [35]
Substitute 5 into both the equations...
-2 (5)+7=-3
5^2+9=34

-3+34=31
hope this helpsss
7 0
3 years ago
Write and graph an equation in point slope form of the line that passes through the given point and with the given slope (3,4) m
AnnyKZ [126]
So slope intercept form y=mx+b slope is m

m=6 so
y=6x+b
this is not the legit way but it works so
put in 3 for x and 4 for y and solve for b
4=6(3)+b
4=18+b
-14=b
b=-14

the slope intercep form is y=6x-14
4 0
4 years ago
James has a model helicopter. The model is 8 inches long and 7 inches wide. The actual helicopter is 56 inches long. What is the
Dominik [7]
56/8=7. so we multiply 7 by 7.7*7=49; the helicopter is 49 in. wide
4 0
3 years ago
Gabriel buys a car for $5,160. His state charges 7% sales tax, $87 for license plates, and $30 for safety and emissions fees. Ho
postnew [5]

Answer:You have 30 days from the date of purchase to title and pay sales tax on your newly purchased vehicle. If you do not title the vehicle within 30 days, there is a title penalty of $25 on the 31st day after purchase. The penalty increases another $25 for every 30 days you are late with a maximum penalty of $200.

When you purchase your vehicle, you may obtain a temporary permit, transfer license plates from a vehicle you already own, or you may purchase new license plates. Our online sales tax calculator may help you estimate the taxes and fees you will pay.

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Triangle ABC was transformed to be triangle FED using
vampirchik [111]

Answer:

the triangle was rotated about 90 degrees i think

4 0
3 years ago
Other questions:
  • A total of $12,000 is invested in two corporate bonds that pay 7.5% and 9% simple interest. The invest wants an annual interest
    6·1 answer
  • Heathers weekly pay is directly proportional to the number of hours she works at the record store her pay is 174 for 24 hours of
    6·1 answer
  • Julie is doing an experiment. She is studying a cell that triples every hour. She started the experiment with 24 cells. How many
    5·1 answer
  • Which expression is equivalent to the given expression? Assume the denominator does not equal zero.
    8·2 answers
  • What is the common difference of the arithmetic sequence graphed below?
    7·2 answers
  • The force of the air's resistance to a certain car (in Newtons) as a function of the car's speed (km/h) is graphed.
    6·1 answer
  • HELP I WILL GIVEBRAINLIST! FALSE ANSWERS OR SPAM WILL BE REPORTED!!!!1
    7·2 answers
  • Express 17.1 6 as a mixed number in lowest terms.<br> 17 1/6<br> 17 1/3<br> 17 4/25<br> 17 5/8
    14·1 answer
  • Help please, i need this answer asap!!!
    11·1 answer
  • At a community fund raiser event, bracelets cost $3 and necklaces cost $6. Complete the patterns in
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!