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
Anvisha [2.4K]
2 years ago
11

Solve 169x^2-42.25=0 by using square roots? NEED HELP!!!

Mathematics
1 answer:
jekas [21]2 years ago
5 0

Answer:

x = 1/2 , x = -1/2

Step-by-step explanation:

Given equation;

169x² - 42.25

Find:

Solution of equation using square root

Computation:

169x² - 42.25

We know that 13² = 169 and 6.5² = 42.25

So,

[13x]² - [6.5]²

a² - b² = (a + b)(a - b)

So,

[13x]² - [6.5]² = [13x + 6.5][13x - 6.5]

So,

13x + 6.5 = 0 , 13x - 6.5 = 0

x = 6.5 / 13 , x = -6.5 / 13

x = 1/2 , x = -1/2

You might be interested in
A student expanded an expression, as shown. Is the student's work correct? Explain why or why not.
alex41 [277]
The work is incorrect.

(-6) multiplies both terms inside parentheses. For some reason, the student changed the sign of that multiplier for the second term. The second term of the result should have a positive sign, the result of multiplying (-6)(-2/13) = +12/13.
4 0
2 years ago
Read 2 more answers
The cake that Larry is baking requires 1 cup of sugar. Larry is adding sugar to a bowl using a measuring scoop. In the first sco
crimeas [40]
No he really sucks at cooking
4 0
3 years ago
Read 2 more answers
10 points please help ASP i need to do a lot of work and I'm behind
tino4ka555 [31]

Answer: 1. Yellow, green, black, white, blue, red. yes equally likely

2. heads, tails. yes equally likely

3. possibilites: yellow heads, yellow tails, green heads, green tails, black heads, black tails, white heads, white tails, blue heads, blue tails, red heads, red tails.

4. 1/12

5. still 1/12

Step-by-step explanation:

3 0
2 years ago
A rectangle has vertices located at (–4, 4), (2, 4), (2, –4) and (–4, –4). What is the length of a diagonal of the rectangle?
Allisa [31]

Answer:

A diagonal of this rectangle has length 10.

Step-by-step explanation:

The vertices (-4, 4) and (-4, -4) have the same x-coordinate (-4) and different y-coordinates (4 and -4).  These two points are the endpoints of a vertical side of the rectangle which has length 4 - (-4) = 8.

Similarly, the vertices (2, -4) and (-4, -4) have the same y-coordinate (-4) but different x-coordinates (2 and -4).  To find the horizontal dimension of the rectangle, we calculate 2 - (-4), which comes out to 6.

Thus, the width of the rectangle is 6 and the length is 8.

Using the Pythagorean Theorem, we find the length of a diagonal as follows:

d = √(6^2 + 8^2) = √(36 + 64) = √100 = 10.

A diagonal of this rectangle has length 10.

5 0
2 years ago
please help me with this: Suppose a teacher gives 10 points for putting your name on a 100 point test. The minimum score on that
sukhopar [10]
Suppose there are n observations in a data set consisting of the observations x1, x2, x3, ..., xn.

Rounding rule: round to one more decimal place than the highest number of decimal places contained in the data.

The formula can also be represented as sigma * xi / n.

x bar = SAMPLE MEAN

Mu = POPULATION MEAN

n= sample size
N= POPULATION SIZE

The sum of the deviations from the mean is always equal to 0.

The mean will always be pulled towards any outliers.

Ex: the average price of similar televisions at different stores. This is quantitative data that does not have outliers since the TVs at the different stores are similar
3 0
2 years ago
Other questions:
  • The point (-3/5,y)in the third quadrant corresponds to angle θ on the unit circle.
    9·2 answers
  • PLEASE ANSWER ASAP!!!
    5·1 answer
  • Geometry help please! Match the reasons with the statements.
    10·1 answer
  • 0.55+.000202+095+55+5.7+0.0071+13.1+.094+0.3
    12·2 answers
  • Least common multiple of 15,24 by using prime factorization
    12·1 answer
  • “ Fill in the blank to make the solution correct 5.6 times ? = -19.04
    11·2 answers
  • What is the Answer to this problem 75x+2=
    7·1 answer
  • In the school store, all markups are 25%. If the store paid $12 for a t-shirt, what is the selling price?
    15·1 answer
  • I need help ASAP please
    10·1 answer
  • . Orlando needs to fix windows in his house. He must buy 3 feets of wood,
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!