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GREYUIT [131]
3 years ago
10

Make d the subject of this formula c=7d

Mathematics
2 answers:
Arlecino [84]3 years ago
5 0
Divide both sides by 7 to get c/7=d
ludmilkaskok [199]3 years ago
4 0
Isolate the d

divide 7 from both sides

c/7 = 7d/7

c/7 = d

d = c/7 is your answer

hope this helps
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I'm Sure no one will see or answer this correctly like always...
timurjin [86]
The answer is d.
Hope I helped!
7 0
3 years ago
Write the equation of the line with an x-intercept at (0,2) and perpendicular to 3x+4y=12.
juin [17]

First you normalize 3x+4y=12 into y = -3/4 x + 3 (dividing by 4).

Then you observe that the slope of the line is -3/4 (it's always the factor with the x). A perpendicular line has the reciprocal slope. Reciprocal means inverted and negated. So -3/4 becomes +4/3.

The equation will thus look like y = 4/3 x + b. To find b, we fill in the given x intercept (0,2), (we get 2 = 4/3 * 0 + b). With x=0, b must be 2.

So the equation is: y = 4/3 x + 2

6 0
3 years ago
Read 2 more answers
Please try this, it's a basic proof that I don't know how to do. Thanks!
avanturin [10]
A cube, is made off 6 squarial faces, so all faces on that cube, are squares, the front, back, left, right, top and bottom.

a square has all equal sides, and also all right angles, so all angles in a square are 90°.  Let's say the sides are "x" long.

now, if we run a plane on that cube diagonally, check the picture below, the diagonal side at the bottom, by usin the 45-45-90 rule as you see it there, will be x√2.

let's keep in mind that, "x" is opposite side of that angle θ, and then x√2 will be the adjacent side of it.

and we can use those two to get the tangent and then the inverse tangent to get the value, as you see it in the picture.

if you need the angle in radians, run the inverse tangent again, just make sure your calculator is in radians mode.

7 0
3 years ago
9(u-2) + 1.5u=8.25
Colt1911 [192]

Answer:

u= 2.5

Step-by-step explanation:

Using BIDMAS

Step 1: Expand the bracket

9(u-2) + 1.5u=8.25

9u-18+1.5u=8.25

Step 2: collect like terms

9u+1.5u=8.25+18

10.5u=26.25

Step 3: Divide both sides by 10.5 to get u

u= \frac{26.25}{10.5}= 2.5

6 0
4 years ago
Read 2 more answers
If the simple interest on $6,000 for 9 years is $3,240 , then what is the interest rate?
igor_vitrenko [27]

Rate of interest is 6 %

<em><u>Solution:</u></em>

Given in question that,

simple interest = $ 3240

number of years = 9 years

principal sum = $ 6000

To find: interest rate

<em><u>The simple interest is given as:</u></em>

S.I = \frac{pnr}{100}

Where, "p" is the principal

"r" is the rate of interest

"n" is the number of years

<em><u>Substituting the values in above formula,</u></em>

3240 = \frac{6000 \times 9 \times r}{100}\\\\3240 = 60 \times 9 \times r\\\\3240 = 540 \times r\\\\r = \frac{3240}{540}\\\\r = 6

Thus rate of interest is 6 %

8 0
3 years ago
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