42 less than the product of 28 and an unknown number is 154

Answers

Answer 1

Answer: 42 less than (-42) the product of (multiply) 28 (28) and an unknown number (x) is (=) 154
28 times x-24=154
pemdas
multiplication
28 times x=28x
28x-42=154
add 42 to both sides
28x+42-42=154+42
28x=196
divide both sides by 28
x=7
the number is 7

Answer 2

Answer: 28X-42=154
+42 +42
-----------------
28X = 196
------ -----
28 28
X = 7

The Best way to Do it

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the mean of Gregs journey times to work on 3days was 28minutes If it took him 27min and 25min on two of the days how long did it take him on the third day

Answers

In order to work out the mean, we add all the values together and then divide by how many values we had. In this case we had
(27 + 25 + x)/3 = 28

To work out what the third day (x) was, we must work backwards and do the opposite.
If finding the mean was adding then dividing, to find the value, we must multiply and then subtract.
Instead of diving by 3, we multiply by 3
28 x 3 = 84
Next we subtract the two values we already have, from 84
84 - 27 = 57
57 - 25 = 32 minutes

On the third day, Greg took 32 minutes to get to work.

mean means average basically you do (total amount over time)/(total time)
in this case
(25+27+x)/(3)=28
solve for x
multiply both sides by 3 to clear fraction
25+27+x=84
add like terms
25+27=55
52+x=84
subtract 52 from both sides
x=32

he worked 32 mins

What is 60 divided by 100 and why? ( I got 0.6 but I'm not sure ) plz hurry

Answers

The answer is 0.6 because you divided 60 and 100 but there not even so your supposed to get a decimal

Your answer is right because when you divide something you are always dividing it out of 100. So this question is pretty easy, 60 / 100 = 0.6 or 3/5 or 6/10. Hope that helps you!

Which algebraic expression is equivalent to the expression below?5(4x + 3) + 5(9 - x)
A.
25x + 60
B.
15x + 60
C.
15x + 30
D.
15x - 60
help fast

Answers

Answer:

15x+60

Step-by-step explanation:

$\sf 5(4x + 3) + 5(9 - x)$

$\sf 20x+15+5\left(9-x\right)$

$\sf 20x+15+45-5x$

$\sf 15x+60$

Let's simplify step-by-step.5(4x+3)+5(9−x)Distribute:=(5)(4x)+(5)(3)+(5)(9)+(5)(−x)=20x+15+45+−5xCombine Like Terms:=20x+15+45+−5x=(20x+−5x)+(15+45)=15x+60

Answer is B

Can anyone help on the second one? Thanks!

Answers

5 floors because 16.25/3.25 equals 5

Answer: 5 floors.

You want to divide the fractions, so do the whole numbers first and then the fractions. You're welcome!

Which function is equivalent to y=x2-10x+9? A: Y=(x+5)^2+16
B: Y=(x-5)^2-16
C: Y=(x-5)^2+16
D: Y=(x+5)^2-16

Answers

Answer:

Step-by-step explanation:

Given

y = x² - 10x + 9

Using the method of completing the square

add/subtract (half the coefficient of the x- term)² to x² - 10x

y = x² + 2(- 5)x + (- 5)² - (- 5)² + 9

= (x - 5)² - 25 + 9

= (x - 5)² - 16 → B

Figure out the equation for each of the multiple choice.

Then you will get the answer .

For example:

a. (x+5)(x+5) +16

= x^2 + 5x+5x+25+16

= x^2+10x+41

Jesse drives 500 miles in 10 hours. what is the unit rate?

Answers

All the necessary information's are already given in the question. Based on these information's the answer to the question can be easily deduced.
In 10 hours Jesse drives = 500 miles
Then
In 1 hour Jesse drives = 500/10 miles
= 50 miles
So the unit rate of Jesse is 50 miles per hour.

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