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
densk [106]
2 years ago
13

Find the value of x.

Mathematics
2 answers:
jonny [76]2 years ago
8 0
6 the answer should be 6 I believe
anastassius [24]2 years ago
4 0

Answer:

im 95% sure the answer is 6

Step-by-step explanation:

when i wrote it down it just never came out to one of thoes answers, but 6 was the closest

You might be interested in
What is the value of the function when x = 4?<br><br> y = 3x + 7
adelina 88 [10]

2x - 3y = 7 and -3x + y = 7..multiply Equation 2 by THREE and add to Equation 1
-9x + 3y = 21...........................watch the y's disappear
-7x........ = 28
x = -4
substitute -4 instead of x in either of the ORIGINAL equations

2x - 3y = 7
2(-4) - 3y = 7
-8 -3y = 7..........add 8 to both sides
-3y = 15
y = -5

im not sure


8 0
3 years ago
Read 2 more answers
Find the equation, (f(x) = a(x - h)2 + k), for a parabola containing point (2, -1) and having (4, -3) as a vertex. What is the s
Nataliya [291]

Answer:

f(x)=\frac{1}{2}x^2-4x+5

Step-by-step explanation:

A parabola is written in the form

f(x)=a((x-h)^2+k) (1)

where:

h is the x-coordinate of the vertex of the parabola

ak is the y-coordinate of the vertex of the parabola

a is a scale factor

For the parabola in the problem, we know that the vertex has  coordinates (4,-3), so we have:

h=4 (2)

ak=-3

From this last equation, we get that a=\frac{-3}{k} (3)

Substituting (2) and (3) into (1) we get the new expression:

f(x)=-\frac{3}{k}((x-4)^2+k) = -\frac{3}{k}(x-4)^2 -3 (4)

We also know that the parabola  contains the point (2,-1), so we can substitute

x = 2

f(x) = -1

Into eq.(4) and find the value of k:

-1=-\frac{3}{k}(2-4)^2-3\\-1=-\frac{3}{k}\cdot 4 -3\\2=-\frac{12}{k}\\k=-\frac{12}{2}=-6

So we also get:

a=-\frac{3}{k}=-\frac{3}{-6}=\frac{1}{2}

So the equation of the parabola is:

f(x)=\frac{1}{2}((x-4)^2 -6) (5)

Now we want to rewrite it in the standard form, i.e. in the form

f(x)=ax^2+bx+c

To do that, we simply rewrite (5) expliciting the various terms, we find:

f(x)=\frac{1}{2}((x^2-8x+16)-6)=\frac{1}{2}(x^2-8x+10)=\frac{1}{2}x^2-4x+5

6 0
3 years ago
Angle Relationships
KonstantinChe [14]

Answer:

D. 21 m

Step-by-step explanation:

I calculated it logically

8 0
2 years ago
You work in the upholstery department of a furniture factory.
sammy [17]

Answer:

total pay in 4 weeks is $ 1960.00

$ 12.25 per hour

Step-by-step explanation:

5 x 165= $ 825

6 x 110= $ 660

5 x 95= $ 475

____________

           $ 1960.00 dollars divided by 160 = 12.25

1960/ 160= 12.25

6 0
2 years ago
A company is constructing an​ open-top, square-based, rectangular metal tank that will have a volume of 49 cubic feet. What dime
yawa3891 [41]

Answer:

b = 4.6 ft

h = 2.3 ft

Step-by-step explanation:

The volume of the tank is given by:

b^2*h=49

Where 'b' is the length of the each side of the square base, and 'h' is the height of the tank.

The surface area can be written as:

A=b^2+4bh\\A=b^2+4b*({\frac{49}{b^2}})\\A=b^2+\frac{196}{b}

The value of b for which the derivate of the expression above is zero is the value that yields the minimum surface area:

\frac{dA}{db} =0=2b-\frac{196}{b^2}\\2b^3=196\\b=4.61\ ft

The value of h is then:

h=\frac{49}{4.61^2}\\h=2.31\ ft

Rounded to the nearest tenth, the dimensions are b = 4.6 ft and h = 2.3 ft.

7 0
3 years ago
Other questions:
  • What is a FREAKIN ratios
    6·2 answers
  • Simplify the expression -4(-10 + 2n)
    10·1 answer
  • PLEASE HELP ME I DONT KNEO HOW TO DO IT
    10·1 answer
  • Given that (5,4) is on the graph of f(x), found the corresponding point for the function f (x)+4
    14·1 answer
  • Describe an error in the work shown below.
    13·2 answers
  • Consider the graph of z. Which lettered point represents z2?
    15·2 answers
  • 6) A brownie recipe requires 1/2 cup of flour, 1/3
    10·1 answer
  • Help plzzzzzzzzzzzzzz ​
    12·1 answer
  • X/v-w = y <br><br>how would you make x the subject here? (x/v-w is the fraction)
    5·1 answer
  • REPEATED REASONING What happens to the circumference and the area of a circle when you double the radius? triple the radius?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!