Solve |3z-7|-4=0,|1- 3k/4|=7 plz thx

Mathematics

1 answer:

madreJ [45]3 years ago

3 0

Z is equal to 28/3 and k is equal to -8, 32/3

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Find the area of the triangle. a. 620 sq. m b. 270 sq. m C. 540 sq. m d. 980 sq.m

IrinaVladis [17]

D. 989 sq.m should be the right answer

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3 years ago

I need help with number 4

Nadusha1986 [10]

$\bf \begin{cases}
\quad3x+2y=-9\\
-10x+5y=-5
\end{cases}$

so hmm the idea behind the elimination, is to make the value atop or below, of either variable, the same but with a negative sign

so hmmm say... we'll eliminate "y"

so... let's see, we have 2y and 5y, both positive
what do we multiply 2y to get a negative -5y, that way, -5y +5y = 0 and poof it goes

well let's see, let's try "k" $\bf 2yk=-5y\implies k=-\cfrac{5y}{2y}\implies k=-\cfrac{5}{2}$

so.. if we multiply 2y by -5/2, we'll end up with -5y

well, let's multiply that first equation then by -5/2

$\bf \begin{array}{rllll}
3x+2y=-9&\qquad\times -\frac{5}{2}\implies &-\frac{15}{2}x-5y=\frac{45}{2}\\\\
-10x+5y=-5&\implies &-10x+5y=-5\\
&&---------\\
&&\frac{-35}{2}x+0\quad=\frac{35}{2}
\end{array}\\\\
-----------------------------\\\\
\cfrac{-35}{2}x=\cfrac{-35}{2}\implies \cfrac{-35x}{2}=\cfrac{-35}{2}\implies x=\cfrac{2}{-35}\cdot \cfrac{-35}{2}
\\\\\\
\boxed{x=1}$

so.. now we know x = 1.... so let's plug that in say hmmm 2nd equation

$\bf -10(1)+5y=-5\implies -10+5y=-5\implies 5y=5\implies\boxed{ y=1}$

3 0

3 years ago

PLEASE HELP!!!!!!!!!!!!!!!!

Annette [7]

Oh no mate I’m not doing your entire homework for you lol. Just find a cylinder surface area calculator online and plug the values in.

8 0

3 years ago

Read 2 more answers

A square prism and a cylinder have the same height. The area of the cross-section of the square prism is 314 square units, and t

Crank

Answer:

The volume of the square prism is 6.28 times the volume of the cylinder

Step-by-step explanation:

Volume of the square prism = cross-section * height

Volume of the cylinder = cross-section * height

Dividing one volume by the other, and replacing with data:

Volume of the square prism / Volume of the cylinder = 314/50 = 6.28

4 0

2 years ago

Please Help Asap !!!! 7!x8!x3/5!x9! = 282,240 14 21

mixer [17]

Answer:

The most likely answer would be 282,240.

Step-by-step explanation:

I got a different value than the choices you've given me. But if 282,240; 14; and 21 are your only options, then the most likely answer would be 282,240. Any number followed by an exclamation point means that it will be multiplied by all whole numbers from 1 to that number. For example, 4! would be 1 * 2 * 3 * 4 = 24. In this problem, 7! equals 5,040; 8! equals 40,320; $\frac{3}{5} !$ = $\frac{1}{40}$ ; and 9! = 362,880. You can tell by the listed numbers that the product will be extremely big despite the fraction, so the best choice to go with would be 282,240.

5 0

3 years ago