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Arte-miy333 [17]
3 years ago
5

What are the steps for evaluating 3x7-4^(2)?

Mathematics
2 answers:
natima [27]3 years ago
7 0

Answer:

5

Step-by-step explanation:

first multiply 3 by 7 as 3x7=21

again find the square of 4 as 4^2=16

finally, subtract 16 from 21 as 21-16= 5

Tpy6a [65]3 years ago
3 0

Answer:

5

Step-by-step explanation:

If the expression is 3 × 7 - 4^{2} :

  1. 4^{2} = 4 × 4 = 16
  2. Plug 16 in: 3 × 7 - 16
  3. 3 × 7 = 21
  4. Plug 21 in: 21 - 16
  5. 21 - 16 = 5
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Emily deposited $5,000 into a savings account 6 years ago. The simple interest rate is 3%. How much money did Emily earn in inte
Rainbow [258]

Answer:

$900

Step-by-step explanation:

First, converting R percent to r a decimal

r = R/100 = 3%/100 = 0.03 per year,

then, solving our equation

I = 5000 × 0.03 × 6 = 900

I = $ 900.00

The simple interest accumulated

on a principal of $ 5,000.00

at a rate of 3% per year

for 6 years is $ 900.00.

6 0
3 years ago
M(x)=x^2-3x<br> N(x)=x-5<br><br> MN(-1)= ?<br><br> A.18<br> B.-20<br> C.-22<br> D. -24
schepotkina [342]

Answer:

d. -24

Step-by-step explanation:

M(-1)=(-1)^2-3(-1)

M(-1)=1+3

M(-1)=4

N(-1)=-1-5

N(-1)=-6

MN(-1)=(4)(-6)

MN(-1)=-24

3 0
3 years ago
A cup of coffee has approximately 310 mg of caffeine. Each hour, the caffeine in your system decreases by about 35%. How much ca
Alex787 [66]

Answer:

∴35.97 mg caffeine would be left in the system after 5 hours.

Step-by-step explanation:

Given that,

A cup of coffee has approximately 310 mg of caffeine.

Caffeine decrease at a rate 35% per hour.

Exponential Function:

y(t)=y_0(1-r)^t

y(t)= Amount caffeine after t hours

y_0= Initial amount of caffeine

r= rate of decrease

t = Time in hour.

Here y(t)=?, y_0 = 310 mg, r=35%=0.35, t= 5 hours

y(t)=310(1-0.35)^5

      =35.97 mg

∴35.97 mg caffeine would be left in the system after 5 hours.

3 0
3 years ago
Simplify the following expression:<br> 4x - 3y + 2z - 3x - y + 3z = ?
nordsb [41]
Add all the like terms together so 4x-3x is x or 1x -3y-y is -4y 2z+3z is 5z so put them all together it's x-4y+5z
7 0
3 years ago
From a group of 11 people, you randomly select 2 of them. What is the probability that they are the 2 oldest people in the group
Artemon [7]

Answer:

2/11

Step-by-step explanation:

Probability is the LIKELIHOOD of an event.

According to the word problem, there are 11 people in total and 2 of them are being selected.

The probability of them being the 2 oldest people is 2 in 11, or 2/11.

8 0
2 years ago
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