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liq [111]
2 years ago
10

Please help, this is timed :))

Mathematics
1 answer:
Margarita [4]2 years ago
8 0

This is the right answer

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Given the quadratic equation below, the standard form of it is
kotykmax [81]

Answer:

Step-by-step explanation:

2x^+9x=10

2x^2+9x-10=0 is standard form

8 0
3 years ago
Find the sum of all multiples of 7 lying between<br>500 &amp; 900​
Anna11 [10]

Answer:

Sₙ = 57/2 * (504 + 896) = 39900

Step-by-step explanation:

first multiple of 7 after 500 is: 72 *7 = 504

last multiple of 7 before 900 is: 128 *7 = 896

a₁ = 504

aₙ = 896  

where n = 128-72 +1 = 57

sum of arithmetic sequence: Sₙ = n/2 * (a₁ + aₙ)

Sₙ = 57/2 * (504 + 896) = 39900

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2 years ago
The lines s and t intersect at point R.
PtichkaEL [24]

Y=29

Set the equations equal to eachother since they're vertical angles and solve.

3 0
3 years ago
Read 2 more answers
A designer is making a rectangular prism box with maximum volume, with the sum of its length, width, and height 8 in. The length
Sever21 [200]

Answer:

width = 1.8 in

length =   3.6 in

height =8-3w =8-3(1.8)= 2.6 in

Step-by-step explanation:

A designer is making a rectangular prism box with maximum volume, with the sum of its length, width, and height 8 in

Let l , w and h are the length , width and height

l +w+h=8\\l=2w

Plug it in the first equation

2w+w+h=8\\3w+h=8\\h=8-3w

volume the box is length times width times height

volume = (2w)(w)(8-3w)\\16w^2-6w^3

To get maximum volume we take derivatived

v'=32w-18w^2

set the derivative =0 and solve for w

0=32w-18w^2\\0=-2w(9w-16)\\w=0 , w= \frac{16}{9}

width = 1.8 in

length = 2w= 3.6 in

height =8-3w =8-3(1.8)= 2.6 in

6 0
3 years ago
Volume of a rectangular Pyramid that has a height of 9 cm length of 8 cm and a width of 9 cm
Alexus [3.1K]

Answer:

length = 8 cm

breadth = 9 cm

height = 9cm

Volume = ?

now,

Volume = l×b×h

= 8cm ×9cm ×9cm

= 648 cm^3.

5 0
2 years ago
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