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3 years ago

Yooo

Mathematics

1 answer:

Stella [2.4K]3 years ago

8 0

Answer:

The first one is d: x=0 or x=6

the second one is the 3rd one

Step-by-step explanation:

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Please help me. thanks

Tasya [4]

Answer:

40 ft/1 in

Step-by-step explanation:

120ft/3in=40ft/1 in

3 0

4 years ago

How to make 15/2 into a mixed number

Mazyrski [523]

Perform division as shown here
You should get 7 1/2

3 0

3 years ago

45. Real Estate Appreciation Bob Michaels purchased a

Tju [1.3M]

Answer:

Since t is between 0 and 15, and the house was purchased 8 years ago, we have two pairs of values:

t = 0, V(0) = 42000
t = 8, V(8) = 67500

<u>Find the slope, m:</u>

m = (67500 - 42000)/8 = 3187.50

The value of b is 42000, since at t = 0, V = 42000

<u>So the equation is:</u>

V = 3187.50t + 42000

The graph is attached.

When V = 72500, t = 9.6 (approximately)

When V = 74000

74000 = 3187.5t + 42000
3187.5t = 32000
t = 32000/3187.5
t ≈ 10 years (rounded down)

When V = 80250

80250 = 3187.5t + 42000
3187.5t = 80250 - 42000
3187.5t = 38250
t = 38250/3187.5
t = 12 years

4 0

3 years ago

Gwen has $20, $10, and $5 bills in her purse worth a total of $220. She has 15 bills in all. There are 3 more $20 bills than the

klio [65]

Answer:

x = 8 ( 20$ bills)

y = 5 ( 10 $ bills)

z = 2 ( 5 $ bills)

Step-by-step explanation:

Let call x, y, and z the number of bill of 20, 10, and 5 $ respectively

then according to problem statement, we can write

20*x + 10*y + 5*z = 220 (1)

We also know the total number of bills (15), then

x + y + z = 15 (2)

And that quantity of 20 $ bill is equal to

x = 3 + y (3)

Now we got a three equation system we have to solve for x, y, and z for which we can use any valid procedure.

As x = 3 + y by substitution in equation (2) and (1)

( 3 + y ) + y + z = 15 ⇒ 3 + 2*y + z = 15 ⇒ 2*y + z = 12

20* ( 3 + y ) + 10*y + 5*z = 220 ⇒ 60 + 20*y + 10*y + 5*z = 220

30*y + 5*z = 160 (a)

Now we have only 2 equations

2*y + z = 12 ⇒ z = 12 - 2*y

30*y + 5*z = 160 30*y + 5* ( 12 - 2*y) = 160

30*y + 60 - 10*y = 160

20*y = 100

y = 100/20 y = 5 Then by substitution in (a)

30*y + 5*z = 160

30*5 + 5*z = 160

150 + 5*z = 160 ⇒ 5*z = 10 z = 10/5 z = 2

And x

x + y + z = 15

x + 5 + 2 = 15

x = 8

4 0

3 years ago

Read 2 more answers

David is buying two CDs. His total before tax is $28.00. If the sales tax rate is 7%, how much tax will he pay?

Savatey [412]

$29.96 because 7% of 28 is 9.96 and 28+29.96 if you want to check my answer get a calculator and do 28x107%

6 0

3 years ago