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inna [77]
2 years ago
10

Solve the z for 57--10z+7

Mathematics
1 answer:
slava [35]2 years ago
3 0

Answer: 57=-10z+7 Answer: z=-- -

Step-by-step explanation: 57=-10z+7 Answer: z=-- -

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Please help me this is a Math 3 post test really important last day of the quarter
jenyasd209 [6]

Answer:

230

Step-by-step explanation:

7 0
3 years ago
Heidi and Andrew designed two raised flowerbeds for their garden. Heidi's flowerbed was 5 feet long by 3 feet wide, and Andrew's
d1i1m1o1n [39]

Answer:

V=90\ ft^3

Step-by-step explanation:

-Given the two heights are similar:

#Heidi's flowered bed dimensions and volume is calculated as:

v=lwh

=5\times 3\times 2\\\\=30\ ft^3

#The width of Andrew's is twice Heidi's. The width and volume is thus calculated as:

w_a=2\times 3=6 \ ft\\\\V_a=lwh\\\\=5\times 6 \times 2\\\\=60\ ft^3

#Total soil volume of the soil used is determined by summing the two different flowerbed volumes:

V=V_h+V_a\\\\=30+60\\\\=90 \ ft^3

7 0
3 years ago
The vertical height v, in feet, of a snowboarder jumping off of an overhang can be modeled by the function h(t)=15-10t-16t^2, wh
olga55 [171]
I don't know for sure, but I think there might be an error in the way you copied your function. In all of my dealings with these types of problems, I have learned the formula to be h(t) = 15 + 10t - 16t^2. Notice the plus in front of the "10t". This is due to the fact that if he pushes off of the overhang he would have an upward force of 10 feet per second as soon as his feet left the ground. The only thing pulling him back to Earth is gravity, modeled by the "-16t^2". This is derived from a bit of slightly advanced physics involving the gravitational constant, but let's work under my formula for a second...

Either way, we will wind up using the Quadratic Formula (or possibly factoring if the numbers are easy enough to work with). So let's start. 

h(t)= 15 +10t - 16t^2

In order to use the QF or factoring I will need to make h(t)=0. Simply done by:

0= 15 +10t -16t^2

Looking at the numbers, I'd prefer to use the QF so here it is:

x= \frac{-b + or -  \sqrt{b^{2}-4ac } }{2a}

I know that my answer will need to be positive since you can't have a negative value when dealing with time, so I will eliminate the positive sign from the "+or-" part leaving me with:

x= \frac{-b -\sqrt{b^{2}-4ac } }{2a}

And I know that a= -16, b= 10, and c=15. So all that's left to do is substitute and solve.

x= \frac{-10 -\sqrt{-16^{2}-4*-16*15 } }{2*-16} 

There's a decent amount of math that would be difficult and sloppy for me to do over the computer, but all you need to do is solve the rest of the equation and you would get your answer.

Exact answer: \frac{5-4 \sqrt{15} }{8} or rounded answer: ≈1.31 seconds.

Hope this helps!
NoThisIsPatrick

7 0
3 years ago
Read 2 more answers
The perimeter of a rectangular concrete patio is 38 meters. The area is 90 square meters. What are the dimensions of the patio?
Nookie1986 [14]
I hope this helps you

6 0
3 years ago
Solve 3/2^x-4=16 Two step equations
Lerok [7]

the answer is

x = 40/3



4 0
3 years ago
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