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
Drupady [299]
2 years ago
9

if a + b + c = 9 and a square + b square + c square = 35 the find the value of ab + bc + ca .​ I am in need of help

Mathematics
1 answer:
Advocard [28]2 years ago
8 0

a+b+c=9 and a2+b2+c2=35 then by using identity

(a+b+c)2=a2+b2+c2+2ab+2bc+2ca,we get the answer 9x9=35+2(ab+bc+ca)

2(ab+bc+ca)=9x9-35

2(ab+bc+ca) =81-35then we get ab+bc+ca=46/2 so ab+bc+ca=23

You might be interested in
Carl. put $1.10 in his piggy bank every day in the month of July. His total savings was $55 at the end of June. hat is the best
Crank
Carl would have around $90 at the end of July
8 0
3 years ago
Read 2 more answers
I need this math problem done as soon as possible!
Vesna [10]

Answer:

See below

Step-by-step explanation:

<u>Parent function:</u>

  • y = 3ˣ

<u>Transformed function:</u>

  • y = 4(3)⁻²ˣ⁺⁸ + 6, (note. I see this as 8, sorry if different but it doesn't make any change to transformation method)

<u>Transformations to be applied:</u>

  • f(x) → f(-x) reflection over y-axis
  • f(-x) → f(-2x) stretch horizontally by a factor of 2
  • f(-2x) → f(-2x + 8) translate 8 units right
  • f(-2x + 8) → 4f(-2x + 8)  stretch vertically by a factor of 4
  • 4f(-2x + 8) → 4f(-2x + 8) + 6 translate 6 units up
7 0
3 years ago
What is the equation of the line that passes through the point (4, 6) and is parallel to the line 2y - 4x = 1?
Cloud [144]

Answer:

D. y = 2x - 2

Step-by-step explanation:

1) First, find the slope of the given line. Place it in slope-intercept form to identify its slope easily. Isolate the y in the equation:

2y-4x = 1\\2y = 4x+1\\y = 2x+\frac{1}{2}

A line placed in slope-intercept form is represented by the formula y = mx + b. The m, or the coefficient of the x-term, represents the slope. Thus, the slope of this line is 2.

2) Lines that are parallel share the same slope. So, the slope of the parallel line will have 2 as its slope as well.

We now have enough information to write the equation of the line in point-slope form. From there, we can convert it to slope-intercept form and find out which option is correct.

Use the point-slope formula y-y_1 = m (x-x_1) and substitute values for m, x_1, and y_1. Since m represents the slope of the line, substitute 2 in its place. Since x_1 and y_1 represent the x and y values of a point the line intersects, substitute the x and y values of (4,6) into the formula as well. Then, with the resulting equation, isolate y like before to find which option is correct:

y-6 = 2(x-4)\\y-6 = 2x-8\\y = 2x-2

So, option D is correct.  

7 0
3 years ago
Pls help!!<br> Find the value of x.
Gelneren [198K]
I think it’s b but I’m not to sure sorry if it’s wrong!
6 0
3 years ago
Find the values of x and y that satisfy the equation.<br><br> 3x+6i=27+yi<br> x
Misha Larkins [42]

Answer:

x = 9

y = 6

Step-by-step explanation:

3x+6i=27+yi

The real components have to be equal and the imaginary components have to be equal

3x = 27

divide by 3

3x/3 = 27/3

x=9

6i = yi

Divide by i

6 = y

3 0
3 years ago
Read 2 more answers
Other questions:
  • Which number is greatest?
    6·2 answers
  • Maria, Keisha, Jo, and Leah wear jerseys numbered 5, 8, 13, and 36, but not necessarily in that order. The girl wearing 8 has a
    11·2 answers
  • Explain how and answer
    8·1 answer
  • What is the area of a triangle with the perimeter of, 15cm, 19cm, and 12cm?
    11·1 answer
  • Please help :) read the question and answer it please
    9·1 answer
  • Which of the following expressions are equivalent to 30 - 8x - 6 - 5x?
    5·1 answer
  • Help please I will give brainlist
    10·1 answer
  • 3.3019 rounded to one decimal places
    15·1 answer
  • Slope 1/3; y intercept = -1
    13·2 answers
  • Diego’s family car holds 14 gallons of fuel. Each day the car uses 0.6 gallons of fuel. A warning light comes on when the remain
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!