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Anna35 [415]
3 years ago
15

Solve the equation 7z=105

Mathematics
1 answer:
zmey [24]3 years ago
4 0
The answer is 15 because u divide 7 on both sides
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NEED HELP NOW I have 31 stamps total. I have 4 more 1-cent stamps than 8-cent stamps and twice as many one cent stamps as 12 cen
krek1111 [17]

x = number of 1-cent stamps

y = number of 8-cent stamps

z = number of 12-cent stamps

We have 31 stamps all together, so x+y+z = 31.

"I have 4 more 1-cent stamps than 8-cent stamps" means we have the equation x = y+8. Whatever y is, add 8 to it to get x. Solve for y to get y = x-8.

You also have "twice as many one cent stamps as 12 cent stamps", so x = 2z. Solving for z gets you z = 0.5x

-------------

x+y+z = 31

x+x-8+z = 31 ... y replaced with x-8

x+x-8+0.5x = 31 ... plug in z = 0.5x

2.5x-8 = 31

2.5x = 31+8

2.5x = 39

x = 39/2.5

x = 15.6

Your teacher made a typo somewhere because we should get a positive whole number result for x (since x is a count of how many 1-cent stamps we have).

8 0
3 years ago
Solve the equation: x2 = 1
oee [108]

Answer:

x = 0.5

Step-by-step explanation:

hope this helps!

3 0
3 years ago
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What is 36.5625 in fraction form
Romashka [77]
The answer is one hundred seventeen over three hundred twenty or 117/320

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2 years ago
A drawer contains 3 white balls and 6 black balls. Two balls are drawn out of the box at random. What is the probability that th
Rudik [331]
You have a 2/9 chance of it being white. It is how many of that color or number over the total, so you have a 2/9 chance of it being white.
6 0
3 years ago
Please help it's the SLOPE
Maksim231197 [3]

Answer:

-  \frac{4}{5}

Step-by-step explanation:

Please see the attached picture.

slope \\  =  \frac{1 - ( - 3)}{ - 3 - 2}  \\  =  \frac{1 + 3}{ - 5}  \\  =  -  \frac{4}{5}

☆In the gradient formula,

(x1, y1) is the first coordinate and (x2, y2) is the second coordinate.

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3 years ago
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