(Picture Included) Can someone help me on 6 and 8?

Mathematics

2 answers:

Neko [114]4 years ago

8 0

8) 9

I don’t wanna think abt 7 it hurts my head

sweet [91]4 years ago

8 0

The answer to question number nine is 9 i can’t think of the rest i have a migraine

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What is the y-coordinate of the solution of the system? <br> {3x+10y=7, x-10y=29}

alexandr402 [8]

We know that:

3x + 10y = 7

We also know that:

x - 10y = 29

Which means that:

x = 29 + 10y

If, x = 29 + 10y,

3(29 + 10y) + 10y = 7

3*29 + 30y + 10y = 7

3(20+9) + 40y = 7

60 + 27 + 40y = 7

87 + 40y = 7

40y = 7 - 87

40y= -80

y=(-80)/40

y=-2

Answer y=-2.

If y=-2,

x-10(-2)=29

x+20=29

x=29-20

x=9

Let's see if these results are true:

3(9)+10(-2)=7

27-20=7 (Correct)

-----------

9-10(-2)=29

9+20=29 (Correct)

Answer once again:

y=-2

8 0

3 years ago

HELPPPPP!! Is the expression 6 + 3 = 9 an equation ? Explain.

Elodia [21]

Answer:

No, because an expression is already solved and an equation is where you have to solve it

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Identify the initial value in each formula below, and state whether the formula models exponential growth or

kaheart [24]

Answer:

Intial Value: f(t) = 2 , Exponential Growth

Step-by-step explanation:

To find the initial value, all we have to do is find the value of f(t) at t = 0

In this case the given equation becomes

$f(t) = 2(\frac{5}{3})^0$

from the law of indices we know that any number with the power 0 is equal to 1 (except 0 with the power 0)

$a^0 = 1$

hence the above equation becomes

$f(t) = 2(1)\\ f(t) = 2$

so the initial value is 2.

To find out whether this is exponential growth or exponential decay we need to see whether the base value of the power t is less than 1 or greater than 1, i.e. from

$(\frac{5}{3} )^t$

$\frac{5}{3}$ > 1 or $\frac{5}{3}$ < 1

if the value is greater, then with each increment in power, the total value will increase while if it is less than 1 then with each increment in power the total value will decrease.

Hence since $\frac{5}{3}$ > 1 then this is an exponential growth