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2 years ago

Simplify 8 over negative 4 divided by negative 3 over 9.

Mathematics

1 answer:

Feliz [49]2 years ago

6 0

We will use reciprocal over here which means the question will now be
8/-4 x 9/-3

The answer will be 6

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3 years ago

Solve for x<br> X<br> 170<br> X=

Vinil7 [7]

Answer:

Step-by-step explanation:

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2 years ago

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93 is what percent of 186?

ra1l [238]

Answer:

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3 years ago

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= The average score of Karl's first four math tests is 72 points. After the fifth and the sixth tests, his average score increas

mylen [45]

Answer:

83 points

Step-by-step explanation:

-The formula for average is given as:

$\bar X=\frac{1}{n}\sum{x_i}\\\\x_i=Individual \ Test \ scores\\n=number \ of \ scores$

Let a be his 5th score and (a+4) of the 6th

#We subtract the sum of the first 4 tests from the 6, to get the sum of the 5th and 6th tests:

$(6^{th}+5^{th})=\bar X n_6-\bar X n_4\\\\=75\times 6-72\times 4\\\\=162$

#We substitute for the 5th and 6th to solve a:

$5^{th}=a\\6^{th}=a+4\\\\a+(a+4)=162\\\\2a=158\\\\a=79\\\\6^{th}=a+4=79+4=83$

Hence, Karl score 83 points in his 6th test.

5 0

3 years ago

Atasha is solving the equation x^2-x=-3 with the quadratic formula.

AlekseyPX

Answer:

a= 1

b= -1

c= 3

Step-by-step explanation:

''a'' and "b" are the coefficients of x^2 and x respectively, where "c" is the constant number.

When solving a quadratic equation all the variables and constants should be on one side, in this case: x^2 -x +3=0.

Here the coefficient of x^2 is one, of x is -1 and constant is 3.

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2 years ago