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3 years ago

What value of d will make this system have the same solution? -3x + 7y = -1 dy = 3

Mathematics

1 answer:

Dima020 [189]3 years ago

4 0

The value of d which will.make this system have the same solution is; d = 21/(3x -1)

First, we must make y, the subject of the formula in each case as follows;

y = (3x -1)/7. and
y = 3/d.

In essence, by equating y to y in both equations; we have;

(3x -1)/7 = 3/d

By Cross-product; we have;

(3x -1).d = 21

d = 21/(3x -1)

Read more on subject of formula;

brainly.com/question/11000305

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3 m 3 m 3 m 3m 7 m Find the surface area of the object.

Dmitriy789 [7]

Answer:

123 m²

Step-by-step explanation:

Surface area of the object = surface area of the bigger rectangular prism + (surface area of the smaller rectangular prism - area of the smaller rectangular prism base)

Surface area of the bigger rectangular prism:

L = 7 m

W = 3 m

H = 3 m

S.A = 2(LW + WH + LH)

S.A = 2(7*3 + 3*3 + 7*3)

S.A = 102 m²

Surface area of the smaller rectangular prism:

L = 3 m

W = 3 m

H = 1 m

S.A = 2(LW + WH + LH)

S.A = 2(3*3 + 3*1 + 3*1)

S.A = 30 m²

Area of the base of the smaller rectangular prism = L*W

L = 3 m

W = 3 m

Area = 3*3 = 9 m²

Surface area of the object = 102 + (30 - 9)

= 102 + 21

= 123 m²

8 0

3 years ago

Is 4/12 greater than 4/6

kherson [118]

Answer:

$\frac{4}{12}$ is not greater than $\frac{4}{6}$

Explanation:

The easiest way to compare fractions is by having a common denominator in both fractions.

This way, we will simply compare numerators

Now, the given fractions are $\frac{4}{12}$ and $\frac{4}{6}$

We can make the denominator in the second one 12 by multiplying it by 2.

However, to preserve the value of the fraction, we will need to multiply it by $\frac{2}{2}$ not only 2.

Doing this, we will have:

$\frac{4}{6}$ * $\frac{2}{2}$ = $\frac{8}{12}$

Now, the two fractions became $\frac{4}{12}$ and $\frac{8}{12}$

Since the denominator is the same, we will simply compare the numerators.

Since 8 is greater than 4, this means that $\frac{8}{12}$ is greater than $\frac{4}{12}$

Hope this helps :)

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3 years ago

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Tasya [4]

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point C (5,-2)

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3 years ago

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Alexandra [31]

Answer:

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Step-by-step explanation:

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2 years ago

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What is the gcf of 100 and 250

Ulleksa [173]

The greatest common factor of 100 and 250 is 50 :D

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3 years ago