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jolli1 [7]
3 years ago
8

If a+b = 7, and a² +b²=25then ab = ?​

Mathematics
1 answer:
Rama09 [41]3 years ago
3 0

a2+b2=25

or, (a+b)^2-2ab=25

or, (7)^2-2ab=25 [a+b=7]

or, 49-25=2ab

or, 24/2=an

•°• ab=12....

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Graph ABCD if A(1, 4), B(6, 6), C(4, 1), and D(−1, −1). Is ABCD a rhombus? Show how you know.
stich3 [128]

C4,1 because I solved it and it showed me

6 0
3 years ago
REASONING IN ALGEBRA AND GEOMETRY Fill in the reason that justifies each step
pantera1 [17]

9514 1404 393

Answer:

  1a. multiplication property of equality

  1b. distributive property

  1c. subtraction property of equality

  1d. division property of equality

  2a. distributive property

  2b. addition property of equality

  2c. division property of equality

Step-by-step explanation:

The properties that let you do the same thing to both sides of an equation are the <em>properties of equality</em>. These are usually given an additional qualifier according to the operation being performed: <em>addition</em> property ..., <em>subtraction</em> property ..., <em>multiplication</em> property ..., <em>division</em> property .... The property that lets you add or eliminate parentheses is the <em>distributive property</em> (of multiplication over addition).

To answer these questions, you need to compare each line to the previous to see what operation was performed. It will generally be use of one of the properties described above, or "simplification," in which like terms are combined.

1a. both sides are multiplied by 3: multiplication property of equality

1b. parentheses are eliminated: distributive property

1c. 18 is subtracted from both sides: subtraction property of equality

1d. both sides are divided by 2: division property of equality

__

2a. parentheses are eliminated: distributive property

2b. 24 is added to both sides: addition property of equality

2c. both sides are divided by 2: division property of equality

5 0
3 years ago
Three high school participated in a study to evaluate the effectiveness of a new computer-based mathematics curriculum. Four 24-
snow_tiger [21]

Answer:

A) experimental

B)  The important factors are : Type of instruction, scores and  High schools,

   The factor levels are :

   Level -1 which comprises of  3 highschool,

   Level -2 which comprises of  highschool and the highschool has  4   sections   and each section has 24 students

   Factor level combinations:

  Level 1 : computer and standard based combination

C) Within the subject : 24 students

   Between subject : High school

D) score of the test

E) student

Step-by-step explanation:

A) The study is experimental because of the random assignment of two different types of instruction to the students which will control/affect the technique of teaching without just observing the performance of the students from the side

B) The important factors are : Type of instruction, scores and  High schools,

   The factor levels are :

   Level -1 which comprises of  3 highschool,

   Level -2 which comprises of  highschool and the highschool has  4   sections   and each section has 24 students

   Factor level combinations:

  Level 1 : computer and standard based combination

C) Within the subject : 24 students

   Between subject : High school

D) The dependent measure  is the score of the test

E) The basic experiment unit of the study is : student

 

8 0
3 years ago
4x - 6+ 2x - 4= 2 + 3x​
Salsk061 [2.6K]

Answer:

4x - 6 + 2x - 4 = 2 + 3x \\ 4x + 2x - 3x = 2 + 6 + 4 \\ 3x = 12 \\  \\ x =  \frac{12}{3}  \\  \\ x = 4

I hope I helped you^_^

3 0
3 years ago
Read 2 more answers
Amersham station is the highest station in the london tube at 147m above sea level. Waterloo statin is the lowest startion at 21
Serjik [45]
168m - it is positive 147 - (-21), so the difference is 168m
4 0
3 years ago
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