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3 years ago

Estimate whether the sum is reasonable or not for 1/5+5/8 is about 3/4.

Mathematics

1 answer:

sergiy2304 [10]3 years ago

8 0

Answer:

Yes

Step-by-step explanation:

You can estimate 1/5 to 1/4 and 4/8 to 2/4 Therefore 1/4+2/4 is 3/4

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What is the inverse of the function below? f(x) = x - 4

iren2701 [21]

Answer:

f^-1(x) = x + 4

Step-by-step explanation:

5 0

4 years ago

In the standard (x,y) coordinate plane, what is the slope of the line 4x+7y=9?

o-na [289]

Answer: -4/7

Step-by-step explanation:

To find the slope, let's change the equation to slope-intercept form.

$4x+7y=9$ [subtract both sides by 4x]

$7y=-4x+9$ [divide both sides by 7]

$y=-\frac{4}{7}x+\frac{9}{7}$

Now, we know the slope is -4/7.

5 0

4 years ago

The total global area of crops has increased from 44.2 million to

alexira [117]

Answer:

311%

Step-by-step explanation:

The percentage change is calculated as ...

percent change = ((new value) -(old value))/(old value) × 100%

Filling in the numbers, we have ...

percent change = (181.5 -44.2)/44.2 × 100% ≈ 311%

The global area increased by 311% over the interval.

7 0

3 years ago

Solve the following quadratic equation by completing the square ✓3x^2 + 10x + 7✓3 = 0

solmaris [256]

$\sqrt{3}x^2+10x+7\sqrt{3}=0\\\\\sqrt3(x^2+\dfrac{10x}{\sqrt{3}}+7)=0\\\\x^2+\dfrac{10x}{\sqrt{3}}+7=0\\\\x^2+\dfrac{10x}{\sqrt{3}}+\dfrac{25}{3}-\dfrac{25}{3} +7=0\\\\(x+\dfrac{5}{\sqrt{3}})^2 = \dfrac{4}{3}\\\\|x+\dfrac{5}{\sqrt{3}}| = \dfrac{2}{\sqrt{3}}\\\\x_1 = \dfrac{2}{\sqrt{3}}-\dfrac{5}{\sqrt{3}} = -\dfrac{3}{\sqrt{3}} = -\sqrt{3}\\\\x_2 = -\dfrac{2}{\sqrt{3}}-\dfrac{5}{\sqrt{3}} = \dfrac{-7}{\sqrt{3}} = -\dfrac{-7\sqrt{3}}{3}$

5 0

3 years ago

Which of the following expressions is equivalent to the expression a^2/3

vladimir1956 [14]

∛a² → C

From the ' law of exponents '

$a^{\frac{m}{n} }$ = $\sqrt[n]{a^{m} }$

3 0

3 years ago