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mote1985 [20]
3 years ago
5

Ok, I don't have a question, so I am just doing this for fun. This is for 7th-8th graders, I am higher than those grades

Mathematics
2 answers:
Llana [10]3 years ago
8 0

Answer:

61

Step-by-step explanation:

If you use

Parentheses

Exponents

Multiplication

Division

Addition

Subtraction

or PEMDAS, you will eventually get 61

Substituting x

(4*3^2)+5^2=            (Use Exponents first)

(4*9)+5^2=                (Use Parentheses now)

(36)+5^2=                  (You can get rid of the Parentheses)

36+5^2=                    (Use Exponents again)

36+25=                      (Now Addition)

61

nadezda [96]3 years ago
5 0

Answer:

73

Step-by-step explanation:

If you are to use Order of Operations, which most people know as PEMDAS, you come up with the following answer.

I will show my work below. Refer to it if you need to.

4x^2+5^2

16x+25

x=3, so 48 + 25

73

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The sum of two numbers is 9. And the sum of their reciprocals is 1/2.find the numbers
Musya8 [376]
Set up a system of equations:

x + y = 9
1/x +1/y = 1/2

The easiest way to solve would be substitution.
x + y = 9 can be solved for y:

y = 9 - x

Then plug this into the second equation and solve for x:

1/x + 1/(9-x) = 1/2
(9-x) + x = x(9-x)/2
9 = (9x-x²)2
18 = 9x - x²
x² - 9x + 18 = 0
(x-6)(x-3) = 0
x = 6, 3

You can check your answer by plugging the two numbers back into both of the equations:

6 + 3 = 9
1/6 + 1/3 = 1/2

The two numbers are 6 and 3.
7 0
3 years ago
Write an equation in slope-intercept form that describes the line with a slope of -2 and (5,4) is on the line
marin [14]

Answer:

The equation in slope-intercept form will be:

  • y = -2x + 14

Step-by-step explanation:

Given

  • slope = m = -2
  • point (5, 4)

We know that the slope-intercept form of the line equation is

y = mx+b

where m is the slope of the line and b is the y-intercept

substituting m = -2 and the point (5, 4) in the slope-intercept form to get the y-intercept 'b'

y = mx+b

4 = -2(5) + b

4 = -10 + b

b = 4+10

b = 14

now substituting m = -2 and b = 14  in the slope-intercept form to get the equation in slope-intercept

y = mx+b

y = -2x + 14

Therefore, the equation in slope-intercept form will be:

  • y = -2x + 14
3 0
3 years ago
7b+12=5b what is the value for b?
likoan [24]

Answer:

B = -6

Step-by-step explanation:

7b + 12 = 5b

12 = -2b

-6 = b

Hope this helps. Pls give brainliest.

6 0
2 years ago
Which expression has a value of 1?
Ket [755]

Answer:

x/x=1

Step-by-step explanation:

when divide any two things which are equal then the answer is 1!!!

8 0
3 years ago
Read 2 more answers
Evaluate if a = 28 and b = -3.<br> a<br> 4 + b<br> = [?]
SVEN [57.7K]

Answer:

109

Step-by-step explanation:

(4)28+(-3)

4*28=112

112+(-3)

112-3

109

Hope this helps, LMK if its right

4 0
3 years ago
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