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IrinaK [193]
3 years ago
7

Help is much needed! thank you

Mathematics
1 answer:
iragen [17]3 years ago
5 0
  • Slope Formula: \frac{y_2-y_1}{x_2-x_1}
  • Slope-Intercept form: y=mx+b , with m = slope and b = y-intercept.

So firstly, we have to find the slope. Looking on this line, we see that two points that are on this line are (0,3) and (4,0). Plug them into the slope formula and solve as such:

\frac{0-3}{4-0}=-\frac{3}{4}

Now we know that the slope is -3/4. Now looking for the y-intercept, we see that it has been provided for us. The y-intercept is (0,3).

<u>Putting our equation together, it is y=-\frac{3}{4}x+3</u>

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Not reading all that LOL
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Rachel really wants to purchase a new skateboard and her mother has agreed to give her a weekly allowance that she can save unti
Slav-nsk [51]

Answer:

Step-by-step explanation:

10x+ 150=220 is the equation for the second plan you subtract 150 from 220 to get 70 and divide that by 10 and you get 7 which is the number of weeks it'll take

220/25=x

So for this one it'll take 8.8 weeks to get enough money and you divide 220 by the amount which is 25 to get 8.8 the number of weeks I'll take

I dont understand what the second one is asking so sorry dude but I think that's right

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4 years ago
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DEF is a right angled triangle calculate the length of EF correct to 3 sigificant figures
Vesnalui [34]

Answer:

\displaystyle EF \approx 15.9

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  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality

<u>Trigonometry</u>

  • [Right Triangles Only] SOHCAHTOA
  • [Right Triangles Only] cosθ = adjacent over hypotenuse

Step-by-step explanation:

<u>Step 1: Define</u>

Angle θ = 28°

Adjacent Leg = EF = <em>x</em>

Hypotenuse = DF = 18

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Substitute in variables [Cosine]:                                                                    \displaystyle cos28^\circ = \frac{x}{18}
  2. [Multiplication Property of Equality] Multiply 18 on both sides:                  \displaystyle 18cos28^\circ = x
  3. Evaluate trig:                                                                                                  \displaystyle 18(0.882948) = x
  4. Multiply:                                                                                                          \displaystyle 15.8931 = x
  5. Rewrite:                                                                                                          \displaystyle EF = 15.8931
  6. Round:                                                                                                             \displaystyle EF \approx 15.9
8 0
3 years ago
10! Or 10 factorial please
Finger [1]

Answer:

3628800

Step-by-step explanation:

just use a calculator if you need these types of things

if you're using this for a equation then substitute with 10*9*8*...

7 0
2 years ago
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