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2 years ago

HELP

Mathematics

2 answers:

mr Goodwill [35]2 years ago

8 0

The answer is b fyhsgdgdhhdbdhdvbdbdbbrhdhdh

Serjik [45]2 years ago

4 0

Answer:

A: 5+7+2.5=14.5/3=4.8333333

B: 6+12+3.5=21.5/3=7.16666666

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What is the solution to the equation PLS

brilliants [131]

Answer:

x=2.5

Step-by-step explanation:

the first thing you want to do is simplify like terms.

you could say this is as 4(x+7)=38

this can easily be solved algebraically.

first use distributive property on the four

this leaves you with 4x+28=38

next, subtract 28 from both sides

4x=10

now divide everything by four and you get x=2.5

6 0

3 years ago

PLEASE help with this question

Tema [17]

Answer:

option A

12m/s

Step-by-step explanation:

Given in the question,

mass of object = 11kg

kinetic energy possess by = 792 joules

To find the velocity we use formula

v = $\sqrt{\frac{2KE}{m} }$

Plug values in the formula

v = $\sqrt{\frac{2(792)}{(11)} }$

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v = $\sqrt{144}$

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3 years ago

Complete the square than convert to vertex form. y=2x^2+8x-9

8_murik_8 [283]

$y=2x^2+8x-9\\D=b^2-4ac\\D=64-4(2)(-9)\\D=64+72 > 0$

There are 2 roots so the only way to complete the square is,

$y=2x^2+8x-9\\y=2[(x^2+4x)]-9\\y=2[(x^2+4x+4)-4]-9\\y=2[(x+2)^2-4]-9\\y=2(x+2)^2-8-9\\y=2(x+2)^2-17$

Just factor 2 out of 2x^2+8x (just ignore the -9) then find the number that will make the terms be able to complete the square.

then complete the square and multiply 2 inside the brackets.

subtraction as you already get the vertex form and know how to complete the square.

Vertex Form: $y=2(x+2)^2-17$

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3 years ago

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nordsb [41]

Answer:

<h3>C. 180 square inches</h3>

Step-by-step explanation:

<h2>#carry on learning </h2><h2>#mark brainlits</h2>

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2 years ago

The perimeter of a rectangle is 72 cm. The length, 1, of the rectangle is 6cm longer than the width, e. What is the width of the

ollegr [7]

Width = 15 Length = 21. Hope this helps:)

4 0

2 years ago