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
Brut [27]
2 years ago
15

Please help....... what's (4)x5

Mathematics
2 answers:
Lina20 [59]2 years ago
7 0
(4)x5 is the same as (4)5 or 4 x 5 

it equals 20
Anna35 [415]2 years ago
6 0
4+4+4+4+4=20
or 5+5+5+5=20
You might be interested in
Find the error & find the correct answer 2In(x)=In(3x)-[In(9)-2In(3)] In(x^2)=In(3x)-[In(9)-In(9)] In(x^2)=In(3x)-0 In(x^2)=
Art [367]

Answer:

Error:lnx^2=ln 3x not ln\frac{3x}{0}

Solution:x=0 and 3

Step-by-step explanation:

We have to find the error and correct answer

Given:2ln x=ln(3x)-[ln9-2ln(3)]

lnx^2=ln(3x)-[ln9-ln3^2]

Using the formula

alog b=logb^a

lnx^2=ln(3x)-[ln9-ln9]

lnx^2=ln(3x)-0

lnx^2=ln(3x)

x^2=3x

x^2-3x=0

x(x-3)=0

Therefore, x=0 and x=3

But last step in the given solution

lnx^2=ln\frac{3x}{0}=\infty

It is wrong this property is used when

log m-log n then

log\frac{m}{n}

Hence, the student wrote  lnx^2=ln\frac{3x}{0}instead of lnx^2=ln3x and solution is given by

x=0 and x=3

4 0
3 years ago
Which equation can be solved using the expression StartFraction negative 3 plus-or-minus StartRoot (3) squared + 4 (10) (2) EndR
katen-ka-za [31]

Answer: B.  2 = 3x + 10x2

Step-by-step explanation:

This is the concept of quadratic equations; We required to find the type of equation that can be solved using the model that has been used to solve the equation such that the answer is:

[-3+-sqrt(3^2+4(10)(2))]/(2(10))

The formual that was applied here was a quadratic formula given by:

x=[-b+\-sqrt(b^2-4ac)]/2a

whereby from the our substituted values above,

a=10,b=3 and c=-2

such that the quadratic equation will be:

10x^2+3x-2 

3 0
3 years ago
Read 2 more answers
If the supplement of an angle is two-third of itself ,then its supplement is
stich3 [128]
( 'x' is not 144 .)
 
The supplement of an angle is (180 - x) .
The problem says that (2/3) of 'x' is equal to (180 - x) .

180 - x = 2/3 x

Multiply each side by 3 :
( Note:  3 x 180 = 540 .)

540 - 3x = 2x

Add 3x to each side:

540 = 5x

Divide each side by 5 :

<u>x = 108°</u> .
5 0
3 years ago
Please help with this, i tried to solve for x, and it didnt give me any of those answers
Firdavs [7]
I hope this helps you




4.1+4. (-x)+2x=3.x+3.1



4-4x+2x=3x+3


-2x-3x=3-4


-5x= -1


x=1/5
3 0
2 years ago
Match the information on the left with the appropriate equation on the right.
zaharov [31]

Answer:

See attachment below

Step-by-step explanation:

For the first option, we are given m = - 2 / 3, b = 3. This is likely in the point - slope form y = mx + b, where m = slope and b = y - intercept. Thus, the equation of the line in point - slope form given this information, should be y = - 2 / 3x + 3. It seems as if none of the following equations match this form, so let us interchange the equation a bit,

y = - 2 / 3x + 3,

y + 2 / 3x = 3,

2x + 3y = 9 - Option C

_______________________________________________________

Next we are given m = - 3 / 2, and that this line passes through the point ( 4, - 1 ). Substitute m as - 3 / 2, x as 4, y as - 1, knowing point ( 4, - 1 ), into the form y = mx + b - solving for b.

- 1 = ( - 3 / 2 )( 4 ) + b,

b = 5,

Thus the equation in point - slope form should be y = - 3 / 2x + 5. None of the choices match this, so let us again alter the equation,

y = - 3 / 2x + 5,

2y = - 3x + 10,

- 2y = 3x - 10 - Option A

_______________________________________________________

( 6, 3 ) and ( 3, 1 ) is given to lie on this line. The slope of the line should be as follows,

Slope = 3 - 1 / 6 - 3 = 2 / 3

Now let us determine the y - intercept ( b ) by substitute one of the points, say ( 6, 3 ). In this case x = 6, and y = 3,

3 = ( 2 / 3 )( 6 ) + b,

b = - 1,

y = 2 / 3x - 1 = Option D

Take a look at the attachment below for further help;

6 0
2 years ago
Other questions:
  • .15 ÷ 180<br><img src="https://tex.z-dn.net/?f=.15%20%5Cdiv%20180%20" id="TexFormula1" title=".15 \div 180 " alt=".15 \div 180 "
    9·1 answer
  • The thickness of a dollar bill is 0.00011 meter. use a single digit times a power of 10 to write a estimate of the thickness
    7·1 answer
  • The area of the ice surface of a skating rink is about 221 yd2. The rink is about the shape of a rectangle where the ice-surface
    5·1 answer
  • A ball, thrown vertically upwards, from the ground, has its height h (in meters) expressed as a function of time t (in seconds),
    9·2 answers
  • Zaria want you to solve this puzzle I am thinking of a number if you divide my number by two and subtract for you will get to wh
    11·1 answer
  • Help please !!!!!!!!
    6·1 answer
  • The water level in a swimming pool decreases from 60 inches to 58.25 inches in one week.
    7·1 answer
  • Can somebody help me ?
    11·2 answers
  • State the equation of the line which has the y-intercept :
    10·1 answer
  • please find the area
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!