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katen-ka-za [31]
2 years ago
15

Evaluate the variable expression when -= 6, b= 5, and c= -3

Mathematics
1 answer:
SVETLANKA909090 [29]2 years ago
4 0

Answer:

34

Step-by-step explanation:

Order of Operations: BPEMDAS

Step 1: Write out equation

(b - 2a)² + bc

Step 2: Define variables

<em>a</em> = 6

<em>b</em> = 5

<em>c</em> = 3

Step 3: Plug in

(5 - 2(6))² + 5(-3)

Step 4: Multiply

(5 - 12)² - 15

Step 5: Parenthesis

(-7)² - 15

Step 6: Exponents

49 - 15

Step 7: Subtract

34

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For the function m(n)=4n-7, when m is 9 what is n?
klio [65]

Answer:

  n = 4

Step-by-step explanation:

Put the given values in the equation and solve for n.

  9 = 4n -7

  16 = 4n . . . . . . add 7

  4 = n . . . . . . . . divide by 4

The value of n is 4 so that m(4) = 9.

8 0
3 years ago
Just need some help with math
V125BC [204]
Each pie/circle has 10 sections. there is 3 whole sections so you would do 10x3 is equal to 30.

then, there’s a fourth pie that has one unshaded section. so, that would be only 9. add the 30 and 9 and you would get 39.

so, for the one fraction, you would get 39/10.

for the mixed number, you get 3 9/10 because 10 goes into 39 3 times and then you have 9 left over.
4 0
2 years ago
A rock is dropped from a bridge 320 feet above the river. The pathway that the rock takes can be modeled by the equation h= -16t
Marina86 [1]

Answer:

The rock will take about 4.5 seconds to reach the river

Step-by-step explanation:

* lets study the situation of the rock

- The rock is dropped means the initial velocity is zero

- The motion is free fall under earth gravity

- The rock dropped from a bridge 320 feet above the river

- The equation of the pathway is h = -16t² + 320

- When the rock reach to the ground the height will be zero

* Now lets substitute h by zero in the equation to find t

∵ h = -16t² + 320

∵ h = 0

∴ 0 = -16t² + 320 ⇒ add 16t² to both sides

∴ 16t² = 320 ⇒ divide both sides by 16

∴ t² = 320/16 = 20

∴ t² = 20 ⇒ take √ for both sides

∴ t = √20 = 2√5 ≅ 4.5 seconds

* The rock will take about 4.5 seconds to reach the river

4 0
3 years ago
The graph of the function y = x² - x - 2 is shown below.
velikii [3]
Y=(x+1)(x-1) this is factored out
5 0
3 years ago
@ranga @Becki . A new car has a sticker price of $22,450, while the invoice price paid was $19,450. What is the percentage marku
densk [106]
To answer the problem given above, divide the difference of the prices by the original price and multiply the answer by 100%. This is,
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Therefore, the percentage markup of the new car is approximately 15.42%.
7 0
3 years ago
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