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Klio2033 [76]
2 years ago
6

PLS HELP WILL GIVE BRANLIEST

Mathematics
1 answer:
AnnZ [28]2 years ago
3 0

Answer:

she took 13 classes that were worth 3 credits

Step-by-step explanation:

well we know that some of the classes are worth 3 and some are worth 4 and that all of these together = 59 so your first equation would be

3x+4y=59

x  would be the number of classes worth 3 credits and y would be the number of classes worth 4 credits.

then it says the total number of classes that they took was 18 so we know that

x + y =18.

you want to solve for the number of 3 credit classes so lets go ahead and get rid of the y values. SO you need you multiply the x+y equation by 4

4x+4y=72

then subtract 4x+4y=72  from 3x+4y=59 to get

-x = -13

and then x is a negative so you need to divide -1 from both sides and you get that she took 13 classes that were worth 3 credits.

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In a certain store, the regular price of a refrigerator is$600. How much money is saved by buying this refrigeratorat 20 percent
Ira Lisetskai [31]

Correct option is A. Money saved is  ′ $6 ′ .

Given

Regular price of the refrigerator = $600

i) Buying the refrigerator at 20 percent off regular price

Final Discount in this case = 20% (Regular price of the refrigerator)

= 20 / 100 × 600

​= $120

ii)  Buying it on sale at 10 percent off regular price and an additional 10 percent off sale price

Discount for the sale = 10% (Regular price of the refrigerator)

=  10/100  × $600

= $60

Sale price of the refrigerator = Regular price of the refrigerator − Discount for sale

= $600 − $60

= $540

Final Discount in this case = 10% (Sale price of the refrigerator)

= 10/100​  × $540

= $54

Money saved if we buy as (case−i) = (Final Discount in (case.i)) − (Final Discount in (case.ii))

= $60 − $54

= $6

Therefore, Money saved is  ′ $6 ′ .

To learn more about percentage from given link

brainly.com/question/24304697

#SPJ4

4 0
1 year ago
Find the value of x.
allsm [11]

Answer:

x=51

Step-by-step explanation:

Formula:  35+16=x

Step 1: Simplify both sides of the equation.

35+16=x

(35+16)=x(Combine Like Terms)

51=x

51=x

Step 2: Flip the equation.

x=51

Hope this helps.

8 0
3 years ago
Find the value of the trig functions indicated .
lara31 [8.8K]

Answer:

The choice; B) 5/3

Step-by-step explanation:

{a}^{2}  +  {b}^{2}  =  {c}^{2}  \\  {15}^{2}  +  {20}^{2}  =  {c}^{2}  \\ 225 + 400 =  {c}^{2}  \\  {c}^{2}  = 625 \\ c = 25

\sec(θ)  =  \frac{1}{ \cos(θ) }  \\  \\  \sec(θ)  =  \frac{1}{ \frac{adjacent}{hypotenuse} }  =   \frac{hypotenuse}{adjacent}  \\  \\  \sec(θ)  =  \frac{25}{15}  =  \frac{25 \div 5}{15\div 5}  =  \frac{5}{3}

4 0
1 year ago
Which operation should be used to solve x + 3 = 7?
Travka [436]

Answer:

You can use the Subtraction property of equality

You have to subtract 3 on both sides to have x alone, which will give you x=4

4 0
3 years ago
Read 2 more answers
2x-7=13 what is answer
Serggg [28]

Answer:

x = 10

Step-by-step explanation:

2x-7=13

2x = 20  (Add 7 to both sides)

x = 10 (Divide by 2 on both sides)

7 0
2 years ago
Read 2 more answers
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