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4 years ago

What is 5+(-7.5)? And try to use a diagram please and thx.

2 answers:

5 0

Basically adding a negative is just subtraction.
I cant add a diagram but ill help ya out.
5+(-7.5) can also be written 5-7.5
Which is fairly simple but it's -2.5.

DIA [1.3K]4 years ago

4 0

Adding a negative is the same as subtracting a positive,
So,

5 + (-7.5) = 5 - 7.5

which is equal to,

-2.5

You can also graph this on a number line

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Help me pls due in 5 mins

Drupady [299]

Answer: $215\ cm^2$

Step-by-step explanation:

Given

Here the given figure can be divided into two shapes i.e. rectangle and a trapezium

For rectangle ABCD Area = $10\times8=80\ cm^2$

Area of trapezium CEFD Area is $\frac{1}{2}[\text{sum of non-parallel sides}]\times[\text{distance between them}]$

$\Rightarrow \frac{1}{2}\times [10+17][10]=135\ cm^2$

Total shaded area $=80+135=215\ cm^2$

5 0

3 years ago

What is an equation of the line that passes through the point ( − 6 , − 1 ) (−6,−1) and is perpendicular to the line 6 x − y = 7

xenn [34]

Answer:

y = $-\frac{1}{6}$ x - 2

Step-by-step explanation:

Given coordinate:

( − 6 , − 1 )

Equation of the given line is 6x− y = 7

Unknown:

Equation of the line that passes through the point and is perpendicular = ?

Solution:

A perpendicular line will have a slope that is of negative inverse to the one given;

6x - y = 7

-y = -6x + 7

y = 6x - 7

According to y= mx + c

y and x are the coordinates

m is the slope

c is the y-intercept

Therefore, the slope of the line = 6

Perpendicular to this = $-\frac{1}{6}$

The new line will be;

Let find the intercept;

-1 = $-\frac{1}{6}$ x (-6) + c

-1 = 1 + c

c = -2

The new line is;

y = $-\frac{1}{6}$ x - 2

4 0

3 years ago

A word or phrase used to show division in a word problem

andre [41]

Divide _ by _
What is _ out of _

For example
Divide 10 by 5
What is 4 out of 100

7 0

4 years ago

Read 2 more answers

What is the ratio of the wavelengths of these two notes?

Lynna [10]

Hey! Thanks for using Brainly.

Could you add a attachment or the question so we can know the two notes in the question? Once you do that I can assist you further.

Looking forward to hear your response.

Have an amazing day! :)

8 0

4 years ago

Jazz and Catherine can eat 50 pounds bag of peanuts in 30 days jazz himself it's 50 pounds of peanuts two weeks last time then C

Cerrena [4.2K]

Answer:

67.8 days

Step-by-step explanation:

We assume the problem statement is supposed to read ...

Jazz and Corbin can eat 50 pounds of peanuts in 30 days. Jazz by himself eats 50 pounds of peanuts in two weeks less time than Corbin does by himself. How many days will it take for Corbin to eat the 50 pounds of peanuts by himself?

Let c represent the number of days it takes Corbin to eat 50 lbs of peanuts. Then c - 14 will be the number of days it takes Jazz to eat 50 lbs of peanuts. Working together, they eat 50 lbs of peanuts in 30 days, so ...

Jazz's peanuts per day + Corbin's peanuts per day = total peanuts per day

50/c + 50/(c-14) = 50/30

Multiplying by (3/5)c(c-14), we get ...

30(c -14) + 30c = c(c -14)

Subtracting the left side gives ...

c^2 -14c -60c +420 = 0

c^2 -74c +1369 = 1369 -420 . . . . subtract 420, add 1369 to complete the square

(c -37)^2 = 949 . . . . . . . . . write more compactly

c = 37 +√949 ≈ 67.8 . . . . square root and add 37

It will take 67.8 days for Corbin to eat 50 lbs of peanuts by himself.

5 0

3 years ago