All categories

3 years ago

Which expression is the same as 1/5 of 7? A. 1/5 x 1/7 B. 5 ÷ 7 C. 7 ÷ 5 D. 1/7 of 5

Mathematics

1 answer:

lilavasa [31]3 years ago

3 0

Answer:

1/5 of 7 can also be written as

C. 7/5

You might be interested in

Practice: Organizing Information Complete the chart to describe the exponents laws and rules.

snow_tiger [21]

Following the generalized form that you wrote, you know that a negative exponent sends its base to the denominator (or numerator if it's in the denominator already). Or to put it formally as you wrote it, for any nonzero real number a and natural number n, the negative rule of exponents states that $a^{-n} = \frac{1}{a^n}$ .

So, $6^{-2}= \frac{1}{6^{2}} = \frac{1}{36}$ .

6 0

4 years ago

Pls help no links in the answer

Dominik [7]

Answer:

Hello my friend, I hope this helps you!

Step-by-step explanation:

7 0

3 years ago

Estimate the area of Alberta in square miles. Show your reasoning

ella [17]

Answer: About $278,250\ mi^2$

Step-by-step explanation:

The missing figure is attached.

Notice in the first picture that Alberta has a complex shape.

You can calculate the area of a complex shape by decomposing it into polygons whose areas can be calculated easily.

Observe the second picture. Notice that it can be descompose into two polygons: A trapezoid and a rectangle.

The area of the trapezoid can be calcualted with the formula:

$A_t=\frac{h}{2}(B+b)$

Where "h" is the height, "B" is the long base and "b" is short base.

And the area of the rectangle can be found with the formula:

$A_r=lw$

Wkere "l" is the lenght and "w" is the width.

Then, the apprximate area of Alberta is:

$A=\frac{h}{2}(B+b)+lw$

Substituting vallues, you get:

$A=(\frac{(410\ mi-180\ mi)}{2})(760\ mi+470\ mi)+(180\ mi)(760\ im)\\\\A=141,450\ mi^2+136,800\ mi^2\\\\A=278,250\ mi^2$

Therefore, the area of of Alberta is about $278,250\ mi^2$ .

5 0

3 years ago

Find the exact value by using a half-angle identity. tan seven pi divided by eight

murzikaleks [220]

9514 1404 393

Answer:

1 -√2

Step-by-step explanation:

$\tan(x/2)=\dfrac{1-\cos(x)}{\sin(x)}\\\\\tan\left(\dfrac{1}{2}\cdot\dfrac{7\pi}{4}\right)=\dfrac{1-\cos\dfrac{7\pi}{4}}{\sin\dfrac{7\pi}{4}}=\dfrac{1-\dfrac{1}{\sqrt{2}}}{-\dfrac{1}{\sqrt{2}}}=\boxed{1-\sqrt{2}}$

tan(7π/8) = 1 -√2

7 0

3 years ago

13. What is the positive solution to this equation? 4x2 + 18 x= 162

MaRussiya [10]

Answer:8.5 is x but there is an extra 1

Step-by-step explanation:18x8.5=153+8=162 with an extra one is 162

3 0

3 years ago