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never [62]
3 years ago
5

Hi! can you please help with this

Mathematics
2 answers:
erastova [34]3 years ago
8 0

Answer:

It will be $40.00

Step-by-step explanation:

hope this helps

jonny [76]3 years ago
7 0

Answer: it is B

Step-by-step explanation: uhhh do 40 X .25 and uhh there you go yeah that’s right

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A+b=77,a-b=13 care sun nr
STALIN [3.7K]
It's a simultaneous equation:
Steps:
1.Number the equations..

a+b=77 -1
a-b=13 -2

2. Choose what variable you want to use. In this case I would use the "b". Since the signs in front of the "b's" are different, add the two equations together

a + b = 77
+ + +
a (-b) = 13

Which gives;
2a = 90

Then solve to find a:
2a=90
a= 90/2
a=45

3.Then plug the "a" value into any of the original equations to find the "b" value. I would use equation 1 since the all the variables are positive.

a + b = 77
(45) + b = 77
b=77-45
b=32

4.Solution

a=45
b=32
3 0
3 years ago
Simplify the expression. Write your answer using only positive exponents. Evaluate any numerical powers.
gtnhenbr [62]

Answer:

  • 9x⁵

Step-by-step explanation:

<u>Use properties of exponents:</u>

  • <u />a^{b} a^{c} = a^{b+c}, (a^{b} ^)^{c} = a^{bc}, 1/a^{-b}  = a^{b}

<u>Simplify the given expression:</u>

  • 3⁴⋅x⋅(3/x²)⁻² =
  • 3⁴·x·(3x⁻²)⁻² =
  • 3⁴·x·(3⁻²)(x⁻²ˣ⁻²) =
  • 3⁴⁻²·x¹⁺4 =
  • 3²·x⁵ =
  • 9x⁵

5 0
2 years ago
The domain for f(x) and g(x) is the set of all real numbers. Let f(x) = 3x + 5 and g(x) = x2. Find g(x) − f(x).
kifflom [539]

Answer:

3x^2 + 8  

Step-by-step explanation:

Given functions,

f(x) = 3x + 8 ----(1)

g(x) = x^2 -----(2)

Since,

(fog)(x) =  f( g(x) )      ( Composition of functions )

=f(x^2)             ( From equation (2) )

=3x^2 + 8          ( From equation (1) )

Hence,

(fog)(x)=3x^2 + 8

Step-by-step explanation:

8 0
3 years ago
How many students do not like any of the three fruits?<br>16<br>17<br>19<br>25​
alexdok [17]

Answer:

  • D. 25

Step-by-step explanation:

Total students = 90

<u>Students who like at least one of the fruit:</u>

  • 20 + 16 + 8 + 4 + 5 + 10 + 2 = 66

<u>Number of students do not like any of the fruits:</u>

  • 90 - 65 = 25
4 0
2 years ago
Helppppppppppppppppppp
Sphinxa [80]

Answer:

Y= -4X + 8

Step-by-step explanation:

Use rise/run to find slope (y2- y1/ x2-x1). Plug the slope into point-slope form [y-y1= m(x-x1)]. this is your answer

3 0
3 years ago
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