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vova2212 [387]
3 years ago
8

A jewellery shop is having a sale.

Mathematics
1 answer:
elena-s [515]3 years ago
3 0

Step-by-step explanation:

if 70% of the orice is 420 then

70x = 100 × 420

70x = 42000

x = 42000/70

x = 600

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2y² - 9y - 2 + 4 (y + 1) =​
Nuetrik [128]

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

2 {y}^{2}  - 9y - 2 + 4(y + 1) =

2 {y}^{2}  - 9y - 2 + 4y + 4 =

2 {y}^{2}  - 9y + 4y - 2 + 4 =

Collect like terms

2 {y}^{2}  - 5y + 2 =

(2y  - 1 )(y - 2)

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

3 0
2 years ago
Read 2 more answers
the sum of three numbers is 15. the second number is double the first. the third number is 5 less than the first. what are the t
tigry1 [53]

Hello from MrBillDoesMath!

Answer:

5, 10, 0

Discussion:

Let "f" be the first number. Then the questions tells us that

f + 2f  + (f-5) = 15           =>

f + 2f + f - 5 = 15            => add 5 to both sides

4f = 5+ 15 = 20              => divide both sides by 4

f = 20/4 = 5

The numbers as

f:        5

2f:     10

(f-5):  0

Thank you,

MrB

5 0
3 years ago
Which is a unit rate?<br> 3:5 2:6 4:7 5:1
kogti [31]

Step-by-step explanation:

all......................

5 0
3 years ago
The volume of a prism is 918 yd3. What is the volume of this prism, measured in feet cubed?
allochka39001 [22]
Volume of a prism= 24,786 ft³
5 0
3 years ago
Sven got a $150 gift card function A(n) 150 12.30n gives the amount of money left on the gift card after n number of visits to t
lorasvet [3.4K]

Answers:

1. The n-intercept is 12. That means after 12 visits the amount of money on the gift car is $0.  

2. The A(n)-intercept is 150. Before the visits, the amount of money on the gift car is $150.


Solution:

Amount of money on the gift card after n number of visits: A(n)=$150-$12.50 n

A(n)=150-12.50 n

1. n-intercept

A(n)=0→150-12.50 n =0

Solving for n: Subtracting 150 both sides of the equation:

150-12.50 n-150 = 0-150

-12.50 n = -150

Dividing both sides of the equation by -12.50:

(-12.50 n) / (-12.50) = (-150) / (-12.50)

n=12

The n-intercept is n=12; for n=12→A(12)=0. Point (n, A(n))=(12,0)


2. A(n) intercept

n=0→A(0)=150-12.50 (0)

A(0)=150-0

A(0)=150

The A(n) intercept is 150; for n=0→A(0)=150. Point (n, A(n))=(0,150)

8 0
3 years ago
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