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3 years ago

5

Please help me !!!!!!!!

1 answer:

a_sh-v [17]3 years ago

3 0

Already answered here:

brainly.com/question/11109172

The appropriate choice is c.

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What value of "a" makes the system 3x-y=17 and ax+y=-7 have no solution?

Norma-Jean [14]

Answer:

y=-7-ax

3x-(-7-ax)=17

3x+7+ax=17

3x+ax=10

x(3+a)=10

x=10,3+a=10 a=10-3 a=7

5 0

3 years ago

Jake gave the cashier $50 to pay for 5 pairs of jeans. The cashier gave him

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Answer:

8.85

Step-by-step explanation:

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3 years ago

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Ginny's earnings from her lemonade stand decreased by 18% from last week to this week Ginny used the following expression to

jolli1 [7]

100-18= 82

B is your answer

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2 years ago

73 pens to 63 pens <br><br><br> Please help step by step

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I ate them

Step-by-step explanation:

because I was hungry and I need a brain

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3 years ago

The amount of radioactive uranium changes with time. The table below shows the amount of radioactive uranium f(t) left after tim

aniked [119]

Answer:

$f(t) = 100(0.25)^t$

Step-by-step explanation:

The general exponential function is,

$f(t)=ab^t$

The points given in the table are,

$(0,100),(0.5,50),(1,25)$

Putting $(0,100),(1,25)$ in the general equation, we get

$\Rightarrow 100=ab^0$

$\Rightarrow a=100$

And

$\Rightarrow 25=ab^{1}$

$\Rightarrow ab=25$

Putting the value of a,

$\Rightarrow 100b=25$

$\Rightarrow b=0.25$

Now the exponential function becomes,

$f(t) = 100(0.25)^t$

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3 years ago

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