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
Alenkinab [10]
3 years ago
13

Work out the value of 1. 7/2 -a ² 2. 3x-8 = 19

Mathematics
2 answers:
Zanzabum3 years ago
8 0

Answer:

1.   -45 1/2.

2.   x = 9.

Step-by-step explanation:

a/b - a^b   when a = 7 and b = 2

= 7/2 - 7^2

= 7/2 - 49

= -91/2

= -45 1/2.

3x - 8 = 19

3x = 19 + 8 = 27

x = 9.

ratelena [41]3 years ago
3 0
Yes it is very easy, but
You might be interested in
When i post this question i will have 690 points lol
Liula [17]

Answer:

y have 3K

xD

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
A jogger goes half a mile north and then turns west. If the jogger finishes 1.3 miles away from the starting point, how far west
Ratling [72]
In order to solve this problem, you must draw a right triangle first to help you visualize the path of the jogger. 
You are given 0.5 miles north (which will be the height of the right triangle), and 1.3 miles (which will be the hypotenuse of the triangle). 
Using Pythagorean Theorem: a²+b²=c², we have:
0.5² + b² = 1.3²
b = 1.3²-0.5²
b = 1.2 miles
3 0
2 years ago
There are 165 children taking swimming lessons at the pool . If 10 children will be assigned to each instructor, how many instru
olchik [2.2K]
Okay so 165 kids 
10 for 1 instructor 
just divide 165 by 10 ? 
8 0
3 years ago
9. In a rhombus whose side measures 34 and the smaller angle is 42°. Find the length of the larger diagonal, to the nearest tent
Veseljchak [2.6K]

Answer:

63.5

Step-by-step explanation:

The diagonals of a rhombus bisect opposite angles.

The longer diagonal bisects the 42° angle

The larger angle of the rhombus is 180 - 42 = 138

Let x = the length of the longer diagonal

You know two sides and the included angle of a triangle.

Using the law of cosines we get

x^{2} = 34^{2} + 34^{2} -2(34)(34) cos 138\\         = 1156 + 1156 - 2312 cos 138\\         = 4030.150837...\\x = \sqrt{4030.150837} = 63.48x^{2} = 34^{2} + 34^{2} -2(34)(34)cos 138\\         = 1156 + 1156 - 2312 cos 138\\         = 4030.1508...\\     x = \sqrt{4030.1508} \\          =  63.48x^2 = 34^2 + 34^2 - 2(34)(34) cos 138

      = 1156 + 1156 - 2312 c0s 138

      = 4030.1508...

x = sq rt 4030.1508...

  =  63.5

7 0
2 years ago
Please I need someone to help my assignment​
Artemon [7]

Answer:

1) 20: 25

2) 15: 3

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Choose the graph below that correctly represents the equation 2x + 4y = 24.
    13·2 answers
  • 5x3 + 14x2 + 9x <br> help
    5·1 answer
  • A candy company makes boxes of chocolates. Each box has 32 chocolates total. Of those 32 chocolates 14 of them have nuts. If the
    9·1 answer
  • Simplify.
    14·1 answer
  • Work out the area of the given shape ;)<br><br> 1. 36 sq m<br> 2. 24 sq m<br> 3. 48 sq m
    11·1 answer
  • <img src="https://tex.z-dn.net/?f=%5Cfrac%7Bx%2B1%7D%7Bx-4%7D%20-%5Cfrac%7Bx%2B1%7D%7Bx%5E%7B2%7D%20%5E%7D-7x%2B12" id="TexFormu
    13·1 answer
  • A matchbox holds 48 matches.how many matches are needed to hold 1104 matches?​
    7·1 answer
  • The perimeter of a rectangular painting is 272 cm if the width of the painting is 61 cm, what is its length?
    5·1 answer
  • What is 12g + 5t + 3t - 2t- 6g make sure to please evaluate the expression
    13·1 answer
  • A baseball player makes 4 hits every 7 times at bat. At this rate, how many times did you hit if you hit 24 hits? 42 times 96 ti
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!