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Brums [2.3K]
3 years ago
9

Help plzzzz :( quick if you can?

Mathematics
2 answers:
9966 [12]3 years ago
6 0

Answer: -9+13f is the correct answer

Step-by-step explanation:

Volgvan3 years ago
6 0

Answer:

✾ \large{ \tt{EXPLANATION}} :

Q. What do you mean by like terms and unlike terms?

⇢ Like terms are those which have the same base whereas unlike terms are those which have the different base [ For eg : In 6p , 3r , 4p & 4r , 6p and 4p are like terms as they have the same base i.e p & 3r and 4r are like terms as they have the same base i.e r ] . Like terms can be added or subtracted as per the signs given and unlike terms are kept as they are. Only coefficient of like terms can be added or subtracted.

  • Lets solve :

\large{ ✶ \: \bf{6f - 1 + 7f - 8}}

\large{ \bf{↬ \: -1 - 8 + 6f + 7f}}

\boxed{\large{ \bf{↬- 9 + 13 f}}}

\boxed{ \boxed{ \large{ \tt{↭ \: OUR \: FINAL \:ANSWER :  \boxed{ \underline{ \underline{ \tt{-9 + 13f }}}}}}}}

\large{ \tt{ \: SIGN \: RULES \: OF \: ADDITION \: AND  \: SUBTRACTION}} :

  • The positive integers are always added and possess the positive ( + ) sign. For example : ( +2 ) + ( + 3 ) = + 5

  • The negative integers are always added but possess the negative ( - ) sign . For example : ( - 5 ) + ( - 2 ) = - 7

  • The negative and positive integers are always subtracted but possess the sign of the bigger integer. For example : ( + 7 ) + ( - 3 ) = 4

✺ \large{ \tt{STUDY \: TIP}} :

  • When writing , studying or reading , listen to music with no vocals. It will allow you to concentrate better. ♪

♨ Hope I helped! ツ

☼ Have a wonderful day / evening ! ☃

# StayInAndExplore ! ☂

▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁

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The equation x2 − xy + y2 = 3 represents a "rotated ellipse," that is, an ellipse whose axes are not parallel to the coordinate
Setler [38]

Answer:

the points where the ellipse crosses the x- axis are (1.73, 0) and (-1.73, 0)

Step-by-step explanation:

To find the points at which a graphic crosses the x-axis we need to find the values for x where y = 0.

Therefore, in the equation x²- xy + y² = 3 we are going to make y = 0 and solve for x

x² - xy + y² = 3

x²- x(0) + (0)² = 3

x² = 3

x = ±√3

x₁ = 1.73 and x₂ = -1.73

Therefore, the points where the ellipse crosses the x- axis are (1.73, 0) and (-1.73, 0)

3 0
3 years ago
A meteorologist who sampled 4 thunderstorms found that the average speed at which they traveled across a certain state was 16 mi
DENIUS [597]

Answer:

The  90 % confidence  interval  for the mean population is (11.176  ; 20.824 )

Rounding to at least two decimal places would give 11.18 , 20.83

Step-by-step explanation:

Mean = x`= 16 miles per hour

standard deviation =s= 4.1 miles per hour

n= 4

\frac{s}{\sqrt n}  =  4.1/√4= 4.1/2= 2.05

1-α= 0.9

degrees of freedom =n-1=  df= 3

∈ ( estimator  t with 90 % and df= 3 from t - table ) 2.353

Using Students' t - test

x`±∈ * \frac{s}{\sqrt n}

Putting values

16 ± 2.353 * 2.05

= 16 + 4.82365

20.824  ;        11.176

The  90 % confidence  interval  for the mean population is (11.176  ; 20.824 )

Rounding to at least two decimal places would give 11.18 , 20.83

4 0
3 years ago
Read 2 more answers
Evaluate the expression(-3.8)+0+y for the given values of y.
11111nata11111 [884]

Answer:

y = -3.3 then  -7.1

y = -7.1 then  -10.9

y = -2.6 then -6.4

y = 1 then -2.8

y = 4.2 then 0.4

Step-by-step explanation:

(-3.8)+0+y can be simplified to -3.8 + y. Evaluate each value for y by substituting it into the expression and solving.

y = -3.3 then -3.8 + -3.3 = -7.1

y = -7.1 then -3.8 + -7.1 = -10.9

y = -2.6 then -3.8 + -2.6 = -6.4

y = 1 then -3.8 + 1 = -2.8

y = 4.2 then -3.8 + 4.2 = 0.4

7 0
3 years ago
Write the inequality for the graphs
Irina18 [472]
A. -3 < x < 1
b. x < = 4 or x > = 6
4 0
3 years ago
Help meeeeeeeeeeeeeee pls
WITCHER [35]

Answer:

Area = 15.36 ft

Step-by-step explanation:

First find the area of the dotted line triangle using the formula: base x height x 1/2, which would be 1.2ft x 12.8 x 1/2 = 7.68ft.

Next, add another triangle at the top, mirroring the shown triangle, of the parallelogram.

Then, find the area of the shape as though it were a rectangle. (base x height) - 2.4 x 12.8 = 30.72.

Next, multiply the area of the invisible triangle by 2, 7.68 x 2 = 15.36ft

and Finally, subtract the area of the rectangle shape of the the sum of the two invisible triangles, 30.72 - 15.36 = 15.36ft

The area of the parallelogram is 15.36 ft.

5 0
3 years ago
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