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3 years ago

3x + 1/5y = 7 Please help me

Mathematics

2 answers:

Nostrana [21]3 years ago

8 0

Answer:

3x + 1/5y = 7

1/5y = 7 - 3x

y = 5 (7 - 3x)

y = 35 - 15x

Step-by-step explanation:

kvv77 [185]3 years ago

3 0

Answer:

y = -15x + 35.

Step-by-step explanation:

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NEEDING HELP ASAP PLEASE :( click on photo

LiRa [457]

9514 1404 393

Answer:

(1, 1)

Step-by-step explanation:

Did you watch the video?

The y-coefficients have opposite signs and one is a multiple of the other. It is convenient to divide the second equation by 2 and add that to the first.

(5x -2y) +1/2(4x +4y) = (3) +1/2(8)

7x = 7 . . . . simplify

x = 1 . . . . . divide by 7

4(1) +4y = 8 . . . . substitute for x in the second equation

4y = 4 . . . . . . . . subtract 4

y = 1 . . . . . . . . . . divide by 4

The solution is (x, y) = (1, 1).

6 0

3 years ago

A=bx+cx+d for x. HELP ME

azamat

Are there numbers?
If there are numbers add b and c then add d to the a then divide a with the b and c and you get the answer if that even makes sense

5 0

4 years ago

Read 2 more answers

1. What is (f⋅g)(x)?

nekit [7.7K]

Answer:

(f⋅g)(x) $= x^7 + 9x^4 - 9x^3 -81$

$(f - g)(x) = x^3 - 6x^2 + 18x + 6x - 10$

Step-by-step explanation:

For the first part of the question we have two functions

$f(x) = x^4 -9$

$g(x) = x^3 + 9$

If the expression refers to the multiplication of f and g, then:

(f⋅g)(x) $= f (x)g(x)$

So we multiply the function f(x) with the function g(x)

(f⋅g)(x) $= (x^4 - 9)(x^3 + 9)$

(f⋅g)(x) $= x^7 + 9x^4 - 9x^3 -81$

For the second part we have the functions:

$f(x) = x^3 -2x^2 + 12x - 6\\\\g(x) = 4x^2 - 6x + 4$

We wish to find (f - g) (x). We know that

$(f - g)(x) = f(x) - g(x)\\\\(f - g)(x) = x^3 - 2x^2 + 12x - 6 - [4x^2 - 6x + 4]\\\\(f - g)(x) = x^3 - 2x^2 + 12x - 6 -4x^2 + 6x - 4$

$(f - g)(x) = x^3 - 6x^2 + 18x + 6x - 10$

5 0

4 years ago

Which logarithmic equation is equivalent to the exponential equation below? e^4x = 5 (the x is part of the ^4 exponent) A. log 5

GalinKa [24]

Keep in mind that "ln" is just a shortcut for the logarithm with a base of "e".

$\bf \textit{exponential form of a logarithm}\\\\
log_{{ a}}{{ ( b)}}=y \implies {{ a}}^y={{ b}}\qquad\qquad 
% exponential notation 2nd form
{{ a}}^y={{ b}}\implies log_{{ a}}{{(b)}}=y \\\\
-------------------------------\\\\
e^{4x}=5\implies log_e(5)=4x\implies ln(5)=4x$

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4 years ago

Read 2 more answers

HELP ME PLS ITS BEEN AN HOUR LUV U GUYS <33

Setler [38]

Answer:

19.6 cubic centimeters

Step-by-step explanation:

The ratio of two similar 3D figures' volumes is equivalent to the ratio of their corresponding lengths (whether it's width, height, length, radius, etc) cubed.

Here, we know the cones are similar, and we know the smaller radius is 2 and the larger radius is 3. Then the ratio of the volume of the smaller one to the volume of the larger one is $(2/3)^3=8/27$ .

We also know the actual volume of the larger cone is 66. So, if x is the volume of the smaller cone, we have the proportion:

x / 66 = 8 / 27

Cross-multiply:

27x = 66 * 8 = 528

Divide by 27:

x = 528/27 ≈ 19.6

The answer is thus 19.6 cubic centimeters.

<em>~ an aesthetics lover</em>

3 0

3 years ago