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3 years ago

Help me with this please

Mathematics

1 answer:

UNO [17]3 years ago

8 0

Answer:

anybody have any friends cute girl or cute sardarni he is my classmate His name Was Kushi ask to Please follow me)

Step-by-step explanation:

anybody have any friends cute girl or cute sardarni he is my classmate His name Was Kushi ask to Please follow me

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help me is my third time posting this can anyone please help me 2 questions can at least answer 1 please

Nimfa-mama [501]

Answer:

For 11, x=18

Step-by-step explanation:

Use a ratio to solve for x since the triangles are similar

16/20=(16+12)/(20+x-3), first simplify both sides

4/5=28/(17+x), cross multiply

4(17+x)=5*28

17+x=5*7

x=35-16

x=18

3 0

3 years ago

Please please help me i’ll mark brainlist

iragen [17]

Answer:

hmmm l

Step-by-step explanation:

4 0

2 years ago

Work out 1/2 x 7 giving your answer as a mixed number

irga5000 [103]

Answer:

$4\frac{1}{2}$

Step-by-step explanation:

This question is basically saying: what is half of 7, or what is 7 divided by 2?

Based on this, it can be written both of the ways as:

»» $\frac{1}{2}$ of 7 <u>OR</u> 7 ÷ 2

So, just solve using either one and you’ll get 4.5 or $4\frac{1}{2}$ . But since the question wants the answer to be a mixed number, then choose $4\frac{1}{2}$ .

Hope this helps! :)

7 0

3 years ago

The Sahara Desert has an area of approximately 9,400,400 km2. While estimates of its average depth vary, they center around 150

dolphi86 [110]

Answer:

$1.128048 \times 10^{25}$ grains of sand are in the Sahara Desert

Step-by-step explanation:

Given :

The Sahara Desert has an area of approximately 9,400,400 sq.km.

Depth = 150 m

To Find :Approximately how many grains of sand are in the Sahara Desert?

Solution:

Area of Sahara desert = 9,400,400 sq.km.

$1 km^2 = 1000000 m^2$

So, $9,400,400 km^2 = 1000000 \times 9400400 m^2$

$9,400,400 km^2 =9.4004 \times 10^{12}m^2$

Volume of sand = $Area \times depth$

= $1.41006\times 10^{15} m^3$

$1 m ^3 = 1000000 cm^3$

So, $1.41006\times 10^{15} m^3 = 1.41006\times 10^{15} \times 1000000cm^3$

$1.41006\times 10^{15} m^3 =1.41006 \times 10^{21}cm^3$

1 cubic cm holds grains of sand = 8000

$1.41006 \times 10^{21}cm^3$ holds grains of sand = $1.41006 \times 10^{21} \times 8000$

= $1.128048 \times 10^{25}$

Hence $1.128048 \times 10^{25}$ grains of sand are in the Sahara Desert

7 0

3 years ago

Write an equation of the line passing through (-6, 1) that is perpendicular to the line 2x -5y = 2

Bess [88]

Answer:

y= -5/2 x + 14 (point slope form)

2y+5x=28 (standard form)

Step-by-step explanation:

Perpendicular lines met the following condition

m1*m2=-1 (the product of their slopes is -1)

To obtain m2, the slope of our desired line lets first re arrange the equation of the first line. 2x-5y=2, so. 2x-2=5y.

Isolating y, leads the following, result: y= 2/5 x - 2/5

m1=2/5

m2 is =-5/2

The equation of our desired line is the following

y=mx+b, we have m, which is -5/2, but still need to find value for b.

Lets now evaluate the above equation in the given point (-6,1).

1=-6 * -5/2 + b.

b=14.

Now we can say the equation that our desired line is

y= -5/2 x + 14 (point slope form)

Or... If we group variables 'x' and 'y' together

y+5/2 x = 14, we want integer coefficients, so lets multiply this expression by 2, to obtain the following:

2y+5x=28

4 0

3 years ago