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2 years ago

the system 5y=8x + 8 and 7y = -8x + 16 is graphed as shown which choice of the point is the point of intersection ?

Mathematics

1 answer:

xenn [34]2 years ago

3 0

Answer:

c= (1/4,2)

Step-by-step explanation:

i did the test and it came out correct i promise !

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Solve for x: 10x+18 = 8x+4

Kobotan [32]

Answer: x= -7

Step-by-step explanation:

subtract 8x from both sides of the equation which would leave you with 2x+18=4

then you would subtract 18 from each side of the equation leaving you with 2x= -14

the divide by 2 on both sides of the equation giving you the answer of

x= -7

7 0

2 years ago

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Dwayne wanted to open a checking account but the bank required him to have a minimum of $100 to open the account. Do I needed to

ANEK [815]

Answer:

$80

Step-by-step explanation:

If $100 is 25% more than Dwayne's original amount (a), you have ...

a + 0.25a = 100

1.25a = 100

a = 100/1.25 = 80

Dwayne originally had $80.

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2 years ago

What is the perimeter of 10cm length and 8cm width of a rectangle ?<br><br>

MaRussiya [10]

Answer:

36 cm

Step-by-step explanation:

rectangle perimeter = sum of all the side

10+8+10+8=36 cm

8 0

2 years ago

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At 10 AM, one share of Starbucks stock was $35. By 2 PM the price was $41. The rate the Starbucks stock value was changing is -

Elanso [62]

Answer:

1.50$

Step-by-step explanation:

difference in money amount: $6

difference in hours: 4

6 divided by 4 equals 1.50.

1.50 times 4 equals 6, hence its 1.50 per hour.

3 0

3 years ago

A medical scientist has a 15-gram sample of I-13, And would like to know it's half-life in days. he also knows that k=0.0856

harina [27]

Answer:

The number of days is approximately 8.

Step-by-step explanation:

Given : A medical scientist has a 15-gram sample of I-13, And would like to know it's half-life in days. he also knows that k=0.0856.

To find : The half-life, in days, of I-131 using the information at the left?

Solution :

The decay model is given by $N=N_0e^{-Kt}$

We have given that,

The substance's half-life is the time it takes for the substance to decay to half its original amount.

i.e. $N=\frac{N_0}{2}$

The value of k is k=0.0856.

Substitute the values in the formula,

$N=N_0e^{-Kt}$

$\frac{N_0}{2}=N_0e^{-(0.0856)t}$

$\frac{1}{2}=e^{-(0.0856)t}$

Taking natural log both side,

$\ln\frac{1}{2}=\ln e^{-(0.0856)t}$

$-\ln2=-(0.0856)t\ln e$

$t=\frac{-\ln2}{-0.0856}$

$t=8.09$

Therefore, The number of days is approximately 8.

4 0

3 years ago

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