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Rus_ich [418]
3 years ago
6

What is -5/7 • 7/5 =

Mathematics
1 answer:
Gnesinka [82]3 years ago
3 0
The answer to this is -1
You might be interested in
Trig help ..............
Vilka [71]
SinA = 3/5
cosA = 4/5

cosB = 3/5
sinB = 4/5


sin(A+B) = sinAcosB + cosAsinB

= (3/5)(3/5) + (4/5)(4/5)
= 9/25 + 16/25
=(9+16)/25
=25/25
=1

therefore, the answer is B
5 0
3 years ago
Five classes collected money for a charity of their choice. The amounts of money collected by the boys and girls of each are sho
34kurt

The girls collected 8.5 pounds more than the boys in class 4

<h3>Complete question</h3>

Five classes collected money for a charity of their choice. The amounts of money collected by the boys and girls of each are shown in the chart below.

In Class 4, how much more money did the girls collect than the boys?

<h3>How to determine the difference in amounts?</h3>

From the attached chart, we have the following amount in class 4:

Girls = 12 pounds

Boys = 3.5 pounds

The difference is calculated as:

Difference = Girls - Boys

So, we have:

Difference = 12 pounds - 3.5 pounds

Evaluate

Difference = 8.5 pounds

Hence, the girls collected 8.5 pounds more than the boys in class 4

Read more about charts at:

brainly.com/question/25583717

#SPJ1

8 0
2 years ago
The lengths and widths of two rectangles are proportional. One
Rashid [163]

The width of the rectangle would be 6 times the first rectangle and the length would be 8 times the first rectangle.

<u>Explanation:</u>

Given:

Two rectangles are proportional.

Length and width of 1 rectangle = 6 : 8

Dimensions of the other rectangle = ?

Let length and width of the other rectangle be x : y

According to the question:

\frac{6}{8} :\frac{x}{y}

\frac{6}{8} X \frac{y}{x}

So, the width of the rectangle would be 6 times the first rectangle and the length would be 8 times the first rectangle.

5 0
3 years ago
Can I have help I am stuck on this problem It would mean the world if u helped me and tysm!! =-)
Marianna [84]

9514 1404 393

Answer:

   10·2^-8 grams

Step-by-step explanation:

The each day, the initial amount for that day is multiplied by 1/2. After 8 days, the initial amount has been multiplied by (1/2)^8, where the exponent of 8 signifies that (1/2) is a factor 8 times in the product.

After n days, the quantity remaining is ...

  q(n) = 10·(1/2)^n = 10·2^(-n)

after 8 days the remaining amount is ...

  q(8) = 10·2^-8 . . . grams

4 0
3 years ago
Find the sum of the interior angles of a regular 14-gon.
Ira Lisetskai [31]

9514 1404 393

Answer:

  2160°

Step-by-step explanation:

The sum of interior angles of a convex n-gon is ...

  angle sum = 180(n -2)°

When n=14, the angle sum is ...

  angle sum = 180(14 -2)° = 2160°

4 0
3 years ago
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