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
shusha [124]
3 years ago
10

The square of sophie's age is 16 less than joanna's age. it is also the case that joanna's age is 8 times that of sophie. how ol

d is joanna?
Mathematics
1 answer:
mote1985 [20]3 years ago
5 0
Let s be Sophie's age. Then joanna is s²+16. Joanna is also 8s, if  Sophie is s. So:
s²+16=8s
s²-8s+16=0
(s-4)²=0
s=4
Sophie is 4; Joanna is 32
☺☺☺☺
You might be interested in
Find the discriminant of the following quadratic equation then state the number of rational, irrational, and imaginary solutions
lianna [129]

Answer:

  • -6x² - 6 = -7x - 9
  • -6x² + 7x - 6 + 9 = 0
  • -6x² + 7x + 3 = 0
  • 6x² - 7x - 3 = 0

<u>Discriminant:</u>

  • D = (-7)² - 4*6*(-3) = 49 + 72 = 121

<u>Since D > 0, there are 2 real solutions:</u>

  • x = (- (-7) ±√121 )/12
  • x = (7 ± 11)/12
  • x = 1.5, x = -1/3

8 0
3 years ago
Read 2 more answers
Which of the following graphs represents the equation Y -2 equals 3 (x-1)
adell [148]

Answer:

3333.6

Step-by-step explanation:

bc i said soo

5 0
2 years ago
Are all trapezoids quadrilaterals
zysi [14]
Yes all trapezoids are quadrilaterals
7 0
3 years ago
Help me pleaseeeeeeeeee
gayaneshka [121]
THE ANSWER IS A.....
7 0
3 years ago
adam drove 280 miles in 4 hours . on average, how fast did he drive in hours per mile ? Express your answer in simplest form
Ivan

Answer:

Step-by-step explanation:

\frac{4 hours}{280 miles}

\frac{1 hour}{70 miles}

5 0
3 years ago
Other questions:
  • Marla borrowed $200 at a 12% simple interest for one year. If he makes no payments that year, how much interest will he she at t
    7·1 answer
  • Mala ran 30 laps in week one and will increase the number of laps she runs by 2 each week. Coby runs 16 laps in week one and wil
    9·1 answer
  • Dale is standing 2x+7 feet from the base of a tower, the tower is 8x-4 feet tall. What is the distance between dale and the top
    14·1 answer
  • Which quadrilateral does NOT always have two pairs of parallel sides? A. A Square B. A Parallelogram C. A Trapezoid D. A Rhombus
    11·2 answers
  • Find the solution to the system of equations by using the substitution method<br> Y=4x+1<br> Y=x+1
    14·1 answer
  • Need help on geometry question
    7·2 answers
  • Three right triangles are drawn in the coordinate plane,
    6·1 answer
  • Help and explanation.
    7·1 answer
  • Please help you have to match it
    5·1 answer
  • Find the value of p in the figure​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!