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ozzi
3 years ago
6

8 + 3 (71 – 51) Solve it's for a test!!!​

Mathematics
1 answer:
bogdanovich [222]3 years ago
7 0

Answer:

68

Step-by-step explanation:

8 + 3 (71 – 51)

71-51= 20

20*3=60

60+8=68

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4. A horizontal ellipse, centered at the origin has a major axis of 10 units and minor axis of 8 units. Write the
s2008m [1.1K]

Answer:

\frac{x^2}{25} +\frac{y^2}{16} =1

Step-by-step explanation:

For ellipses, the length of the major axis is represents as:

Major axis = 2a

where a is called the semi-major axis.

In this case since the major axis is equal to 10 units:

10=2a

solving for the semi-major axis a :

a=10/2\\a=5

and also the minor axis of an ellipse is represented as:

Minor axis = 2b

where b  is called the semi-minor axis.

Since the minor axis has a length of 8 units:

8=2b

solving for b:

b=8/2\\b=4

Now we can use the equation for an ellipse centered at the origin (0,0):

\frac{x^2}{a^2} +\frac{y^2}{b^2} =1

and substituting the values for a and b:

\frac{x^2}{5^2} +\frac{y^2}{4^2} =1

and finall we simplify the expression to get the equation of the ellipse:

\frac{x^2}{25} +\frac{y^2}{16} =1

5 0
3 years ago
At a yearly basketball tournament, 64 different teams compete. After each round of the tournament, one-fourth of the teams remai
artcher [175]

Answer:

64*(1/4)^x

Step-by-step explanation:

64 is the starting number because it is given, and x represents how many rounds there are. 1/4 represents how much of the teams remain after each round.

5 0
3 years ago
Pls find the area to the second power.
Tom [10]
First of all gall, the end is NOT an exponent, its the unit of measurement for finding the area (thats square units)

Heres the answer:
31.5 square units.
Explanation:
The formula for the area of a triangle is bh/2
The formula for the area of a triangle is bh
(Use this formula and try to find the real explanation)
3 0
3 years ago
Read 2 more answers
Solve the equation for x. x/3 = -4 <br><br><br><br>A. -12<br>B.-7<br>C.7 <br>D.12
UNO [17]
-12 divided by 3 equals -4
6 0
3 years ago
Read 2 more answers
18 - x/3 = -7 I NEED HELP FAST
stellarik [79]
3(18 - x/3 = -7)

54-x = -21

-x = -75

x = 75
7 0
3 years ago
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