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3 years ago

How do i find what x equals for 7x-5=-5

1 answer:

6 0

7 (x) - 5 (-5) which equals to: 0

7x = 0 (⬅solve this if you divide [÷] both sides of the problem by "7")

Therefore, the value of "x" is: "0" (:

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The point (-2, k) lies on the line 2x – 4y + 3 = 0.<br> Find the value of k.

Over [174]

Answer:

k = (-1/4)

Step-by-step explanation:

Given that,

The point (-2, k) lies on the line 2x – 4y + 3 = 0.

We need to find the value of k.

Put x = -2 and y = k in the given equation.

2(-2) – 4k + 3 = 0

-4-4k = -3

-4+3 = 4k

-1 = 4k

k = (-1/4)

So, the value of k is equal to (-1/4).

6 0

3 years ago

A brand of cereal had 1.2 milligrams of iron per serving. Then they changed their recipe so they had 1.8 mg of iron per serving.

Anvisha [2.4K]

Using it's concept, it is found that the percent increase in the amount of iron per serving was of 50%.

<h3>What is the percentage increase of a value?</h3>

It is given by the increase divided by the initial value, and subtracted by 100%.

In this problem:

The initial value is of 1.2 mg.

The increase was of 1.8 mg - 1.2 mg = 0.6 mg.

Hence the percent increase is given by:

P = 0.6/1.2 x 100% = 50%.

More can be learned about percentages at brainly.com/question/10491646

#SPJ1

8 0

2 years ago

Which expression is not a polynomial?<br> x³<br> x² - 2x<br> x³ +1<br> 12x

zaharov [31]

Answer:

12x

Step-by-step explanation:

It has no exponent so it is not a polynomial

3 0

2 years ago

Find the dr/d(theta) for:<br>r = (theta)sin(theta) + cos(theta)

maxonik [38]

$r=\theta\sin\theta+\cos\theta$

$\dfrac{\mathrm dr}{\mathrm d\theta}=\dfrac{\mathrm d(\theta\sin\theta)}{\mathrm d\theta}+\dfrac{\mathrm d(\cos\theta)}{\mathrm d\theta}$

By the product rule,

$\dfrac{\mathrm d(\theta\sin\theta)}{\mathrm d\theta}=\dfrac{\mathrm d(\theta)}{\mathrm d\theta}\sin\theta+\theta\dfrac{\mathrm d(\sin\theta)}{\mathrm d\theta}=\sin\theta+\theta\cos\theta$

and

$\dfrac{\mathrm d(\cos\theta)}{\mathrm d\theta}=-\sin\theta$

So we have

$\dfrac{\mathrm dr}{\mathrm d\theta}=\sin\theta+\theta\cos\theta-\sin\theta$

$\implies\dfrac{\mathrm dr}{\mathrm d\theta}=\theta\cos\theta$

4 0

3 years ago

What is the LCM of 37 and 12?

artcher [175]

$37|37 \\ 1 \\ \\ 12|2 \\ 6 \ |2 \\ 3 \ |3 \\ 1 \\ \\ 12=2^2*3 \\ \\ L.C.M(37;12)=444$

6 0

4 years ago