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Jet001 [13]
3 years ago
7

How do u solve (2d-5)/2 = (5d+2)/9

Mathematics
1 answer:
Rzqust [24]3 years ago
8 0

Answer:

D=  49/8

Step-by-step explanation:

Cross-multiply.

(2d-5)/2 = (5d+2)/9

(2d−5)*(9)=(5d+2)*(2)

18d−45=10d+4

Subtract 10d from both sides.

18d−45−10d=10d+4−10d

8d−45=4

Add 45 to both sides.

8d−45+45=4+45

8d=49

Divide both sides by 8.

d=  49/8

So the answer is 49/8

I hope it's right!

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The national sales manager for a textbook publishing company wishes to estimate the mean number of books sold per college. She w
Tresset [83]

Answer: It is true that required total sample size is less than the pilot sample already taken.

Step-by-step explanation:

Since we have given that

N = 30

Margin of error = E = 30

Standard deviation = 60

At 95% level of significance,

z = 1.96

So, the value of sample would be

n=(\dfrac{z.\sigma}{E})^2\\\\n=(\dfrac{1.96\times 60}{30})^2\\\\n=(1.96\times 2)^2\\\\n=3.92^2\\\\n=15.366

So, it is true that required total sample size is less than the pilot sample already taken.

7 0
4 years ago
How do you find square numbers
drek231 [11]
To find square numbers, you multiply the number by itself.

For example:
5 x 5 = 25
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5 0
3 years ago
Identify the x and y intercepts of the function y=2x+4
Umnica [9.8K]

Answer:

  • x-intercept: -2
  • y-intercept: 4

Step-by-step explanation:

The function is written in slope-intercept form, so the constant (4) is the y-intercept.

The x-intercept is found by solving for x when y = 0.

  0 = 2x +4

  0 = x +2 . . . . . divide by 2

  -2 = x . . . . . . . the x-intercept

The x-intercept is -2; the y-intercept is 4.

6 0
3 years ago
The vertices of ΔABC are (-2,0), (-2, 3), and (-5, 1). T(x,y) = (x + 1, 3y) represents the transformation of the triangle. What
Gnoma [55]

using the equation for the transformation:

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new coordinates are (-1,0) (-1,9) (-4,3)


you don't have an image attached, so to see if they are congruent, the sides need to stay the same lengths and the angles need to stay the same, from the coordinates of the new triangle, I would say they are not congruent

8 0
3 years ago
Eli has bought a shirt and a pair of pants for a total of 600 kr. Simin bought four of those shirts and two of those pants, and
fgiga [73]

Answer:

Step-by-step explanation:

let the price of one shirt be x and one pant be y

Eli--> x+y=600------eq1

Simin-->4x+2y=1500-----eq2

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now subtract ew2 from 1

you will get y=450 and x=150

so price of one shirt=150 kr

4 0
3 years ago
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