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2 years ago

7=40/z-1 z= what dose the z equal?

Mathematics

2 answers:

monitta2 years ago

8 0

Answer:

$z = \frac{47}{7} = 6 \frac{5}{7}$

Step-by-step explanation:

$7 = \frac{40}{z - 1} \\ 7(z - 1) = 40 \\ 7z - 7 = 40 \\ 7z = 40 + 7 \\ 7z = 47 \\$

$\boxed{\bold{Answer:{\boxed{\green{\bold{z = \frac{47}{7} = 6 \frac{5}{7}}}}}}}$

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★ . ꜝꜞ ᳝ ࣪ hope that helped! ʬʬ

pickupchik [31]2 years ago

8 0

Answer:

z = 5

Step-by-step explanation:

7=40/z-1

- Add 1 to both sides.

8 = 40/z

- Multiply z to both sides.

8(z) = 40/z (z)

8z = 40

z = 5

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NNADVOKAT [17]

1. since the equations equal each other
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x= -12
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y= -12+7
y= -5

2. x+2y=-7
x+y+23=0
i don't know what the second equation is equal to, i'll assume 0

2y=x-7
y=1/2x-7/2
sub this into x+y+23=0
x+1/2x-7/2+23=0
3/2x+39/2=0
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3/2x= -39/2
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sub into y=1/2x-7/2
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3. x+5y=2
x=-4y+5
sub x=-4y+5 into x+5y=2
-4y+5+5y=2
y+5=2
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y= -3
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4. 3x+y=9
y=-5x+9
sub -5x+9 into 3x+y=9
3x+(-5x+9)=9
3x-5x+9=9
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2 years ago

Tom opens a bank account and makes an initial deposit of $500. The banker tells Tom that he is going to receive

Katena32 [7]

Bank balance after 15 years is $950

Step-by-step explanation:

Step 1: Find the simple interest on the principal amount using the formula SI = PRT/100 where Principal (P) = $500, Rate of Interest (R) = 6% and Time(T) = 15 years

⇒ SI = 500 × 6 × 15/100 = $450

Step 2: Find total amount using the formula Amount = P + SI

⇒ Amount = 500 + 450 = $950

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3 years ago

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monitta

15. 3x - 2y = -2
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3 years ago

A class of 40 students elected a class president. There were 12 votes for Candidate A, and 18 votes for Candidate B.

Helen [10]

Hey there, Bulgogi!

The correct answer will be the first one since [I'm assuming] you know that to calculate the percentage of something, it's the amount of that something divided by the total amount but since only 30 students voted [12+18] multiplied by 100.

So, we are calculating the percentage on votes and 12 students voted for Candidate A so our Numerator will be 12 and our Denominator will be the total amount of student who voted, so 30 [or 12+18]

Once put into a fraction, we will get $\frac{12}{12+18}$ which would be equals to 2/5 or 0.4. Now we multiply by 100 and we get a total of 40% for Candidate A.

Thank you for using Brainly.
See you soon!

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adell [148]

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