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yulyashka [42]
3 years ago
11

Help help help from !!!!!!!!!!!!!

Mathematics
2 answers:
Varvara68 [4.7K]3 years ago
8 0

Answer:

28

Step-by-step explanation:

(35/5) ÷ (-3/4)

= (35/5) x (-4/3)

= 7 x (-4/3)

= -(7 x 4) / 3

= -28 / 3

hence the numerator is 28

vova2212 [387]3 years ago
6 0

Answer:

-\frac{28}{3}  \\

Step-by-step explanation:

\frac{35}{5} \div  - \frac{3}{4} \\  \\   \frac{7}{ -\frac{3}{4}  }  \\  \\  -\frac{28}{3}

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The profits of two different manufacturing plants can be modeled as shown. Where x is the number of units produced at each plant
svlad2 [7]
The answer to this is 600
6 0
2 years ago
What is the slope of the line through (-9,6) and (-6,-9)
Juliette [100K]

\text{The slope formula:}\ m=\dfrac{y_2-y_1}{x_2-x_1}\\\\\text{We have:}\\(-9;\ 6)\to x_1=-9;\ y_1=6\\(-6;\ -9)\to x_2=-6;\ y_2=-9\\\\\text{substitute:}\\\\m=\dfrac{-9-6}{-6-(-9)}=\dfrac{-15}{-6+9}=\dfrac{-15}{3}=-5

Answer: m = -5

7 0
3 years ago
Which of the following functions are solutions of the differential equation y'' + y = 3 sin x? (select all that apply)
DiKsa [7]

Answer:

C

Step-by-step explanation:

We must compute the derivatives and check if the equation is satisfied.

A. y'=(3\sin x)'=3\cos x. Differentiate again to get y''=(3\cos x)'=-3\sin x, then y''+y=-3\sin x+3\sin x=0\neq 3\sin x so this choice of y doesn't solve the equation.

B. y'=3\sin x+3x\cos x-5\cosx +5x\sin x=(5x+3)\sin x+(3x-5)\cos x and y''=5\sin x+(5x+3)\cos x+3\cos x-(3x-5)\sin x=(10-3x)\sin x+(5x+6)\cos x, then y''+y=10\sin x+6\cos x\neq 3\sin x so y is not a solution

C. y'=\frac{-3}{2}\cos x+\frac{3}{2}x\sin x hence y''=\frac{3}{2}\sin x+\frac{3}{2}\sin x+\frac{3}{2}x\cos x=3\sin x+\frac{3}{2}x\cos x. Then y''+y=3\sin x+\frac{3}{2}x\cos x-\frac{3}{2}x\cos x=3\sin x so y is a solution.

D.y'=-3\sin x and y''=-3\cos x, then y''+y=0 thus y isn't a solution

E. y'=\frac{3}{2}\sin x+\frac{3}{2}x\cos x hence y''=\frac{3}{2}\cos x+\frac{3}{2}\cos x-\frac{3}{2}x\sin x=3\cos x-\frac{3}{2}x\cos x. Then y''+y=3\cos x-\frac{3}{2}x\cos x-\frac{3}{2}x\cos x=3\cos x\neq 3\sin x then y is not a solution.

3 0
3 years ago
ASAP!! PLEASE NEEDS TO BE ANSWERED TODAY
olganol [36]

Answer:

20.7 units

Step-by-step explanation:

The reading is:

-20.7

So, 20.7 units below the water's surface

8 0
3 years ago
Read 2 more answers
kwasi thought of a number, multiplied it by7/2 and added 16 to the results.if the final answer was 30.what number did he think o
ziro4ka [17]

Answer:

4

Step-by-step explanation:

  1. represent the number he thought of with x

\frac{7}{2} x + 16 = 30

  1. multiply through with the LCM which is 2
  2. 2 \times  \frac{7}{2}x + 16 \times 2 = 30 \times 2
  3. 7x + 32 = 60
  4. 7x = 60 - 32
  5. 7x = 28
  6. \frac{7x}{7}  =  \frac{28}{7}
  7. x = 4
7 0
3 years ago
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