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defon
3 years ago
7

I have some questions that need to be answered fast. 1. 42/j = 35/55

Mathematics
1 answer:
Novay_Z [31]3 years ago
6 0

\frac{42}{j}  =  \frac{35}{55}

to solve for j first you need to cross multiply;

j × 35 = 42 × 55

35j = 2,310

j = 2,310 ÷ 35 (did the inverse operation)

j = 66

Hope that helps :D

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Jean drove 64 miles per hour for a total of 448 miles on a trip. She used the equation below to calculate the time, t, it would
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Answer:

Step-by-step explanation:

since there is no given formula I'm guessing that's what we want to find?

use the dist. = rate * time   formula for this kind of problem

or  d = r*t     ( this looks like the word  "dirt" to me so I call this the dirt formula partly b/c it's dirt simple, and it's generally about moving across some give dist. of dirt  :P )  

so Jean's rate is 64 MPH

her total distance is 448 miles  

rearrange the  d = rt  formula so that you are solving for the thing you don't know.. yet....   t (time)  for this case

soooo...

d/r = t

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3 years ago
What is the value of the expression when s=2 and t=1.5 -3|5-s3|+3t​
Anuta_ua [19.1K]

Answer:

-4.5

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Algebra I</u>

  • |Absolute Value| - makes any negative number positive

Step-by-step explanation:

<u>Step 1: Define</u>

-3|5 - s³| + 3t

s = 2

t = 1.5

<u>Step 2: Evaluate</u>

  1. Substitute in variables:                                                                                     -3|5 - 2³| + 3(1.5)
  2. |Absolute Value| Exponents:                                                                            -3|5 - 8| + 3(1.5)
  3. |Absolute Value| Subtract:                                                                               -3|-3| + 3(1.5)
  4. Absolute Value:                                                                                                -3(3) + 3(1.5)
  5. Multiply:                                                                                                             -9 + 4.5
  6. Add:                                                                                                                   -4.5
6 0
2 years ago
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