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Vesna [10]
4 years ago
9

7th grade math I need some help

Mathematics
1 answer:
Ivanshal [37]4 years ago
3 0

Answer:

Step-by-step explanation:

(-14+\frac{3}{2}b)-(1+\frac{8}{2}b)=-14-1+\frac{3}{2}b-4b

                                   = (-15-\frac{5}{2}b)

(5+2b)+(2b+\frac{3}{2})=(5+\frac{3}{2})+(2b+2b)

                             = (4b+\frac{13}{2})

(\frac{7}{2}b-3)-(8+6b) = (\frac{7}{2}b-6b)-(3+8)

                             = (-\frac{5}{2}b-11)

(-10+b)+(7b-5)=(-10-5)+(b+7b)

                               = (8b-15)

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Solve the equation after making an appropriate substitution. X^6-98x^3=3375
Leni [432]
Rearrange x^6-98x^3=3375 to give

x^6-98x^3-3375=0

Let x^3 be a variable 'p' and so we can write x^6 as x^6=(x^3)(x^3)=(p)(p)= p^2

Rewrite the equation in terms of 'p'

p^2-98p-3375 = 0

where a=1, b=-98, c=-3375

using the quadratic formula \frac{-b+ \sqrt{b^2-4ac} }{2a} and subsitute the value of a, b, c

p_1= \frac{-(-98)+ \sqrt{(-98)^2-4(1)(-3375)} }{2} =125

p_2= \frac{-(-98)- \sqrt{(-98)^2-4(1)(-3375)} }{2} =-27

There are two value of p; 125 and -27 

Now we find the value of x

Earlier we substitute x^3 for p and x^6 for p^2

When p=125, x= \sqrt[3]{125}=5
When p = -27, x= \sqrt[3]{-27}=-3

So the final answer is the two values of x; 

x = 5 OR x = -3
3 0
3 years ago
George wrote an integer. The opposite of George’s integer is -53. Which of these statements about George’s integer must be true?
vlabodo [156]

The George's integer must be true for option D)I and IV.

What is integer?

 A full number (not a fraction) that can be positive, negative, or zero is called an integer . -5, 1, 5, 8, 97, and 3, 043 are some examples of integers. 1.43, 1 3/4, 3.14, and other numbers are examples of non-integer numbers. Integer, which means full or whole in Latin, is the root of the English term integer. A particular category of numbers called integers includes zero, positive numbers, and negative numbers. All whole numbers, both negative and positive, and 0 are considered integers.

Here the opposite of George integer is -53.

We know that opposite value of x is -x.

Then George integer is 53.

George integer must be true for The given options I. the integer is 53 and IV.The integer has absolute value of 53.

Therefore the correct option is  D) I and IV.

To learn more about integer refer the below link

brainly.com/question/13723636

#SPJ9

5 0
1 year ago
4% of how many days is 56 days
gulaghasi [49]
56/.04=1400

Is that what you meant?
6 0
4 years ago
PLEASE ANSWERR I WILL GIVE OUT BRAINLIEST TO FIRST CORRECT ANSWER!!!
Alchen [17]

Answer:

its option 2!

Step-by-step explanation:

www.inchcalculator.com/compare-fractions

8 0
3 years ago
Formulating and solving inverse variation functions
andreyandreev [35.5K]

Answer:

See below.

Step-by-step explanation:

A. k = 50 * 3.6 = 180.

B. The equation is y = 180/x.

C. When x = 75, y = 180/75

= 2.4.

D.  Checking C:  2.4 = 180/75 = 2.4. Correct

7 0
3 years ago
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