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3 years ago

Please help ill mark brainliest and add explanation too pleas

Mathematics

1 answer:

andriy [413]3 years ago

5 0

Step-by-step explanation:

In A,

length=3units

width=2 units

area=length×width

area=3×2 sq.units

area=6 sq.units

In B,

length=1unit

width=4units

area=length × width

area=1unit × 4units

area= 4 sq.units

Note:if you need to ask any question please let me know.

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Find the degrees of all the sides

spayn [35]

You can use the law of Cosines to solve an SSS triangle.

$cos A = \frac{b^2 + c^2 - a^2}{2bc}$
a = 13
b = 21
c = 29
Lets find A first:
$cos A = \frac{b^2 + c^2 - a^2}{2bc}$
$cos A = \frac{21^2 + 29^2 - 13^2}{2(21)(29)}$
$cos A = \frac{441+ 841 - 169}{1218}$
$cos A = \frac{1113}{1218}$
$cos A = \frac{53}{58}$

$A = cos^{-1}(\frac{53}{58}) = 23.96509$

Now lets find B
$cos B = \frac{a^2 + c^2 - b^2}{2ac}$
$cos B = \frac{13^2 + 29^2 - 21^2}{2(13)(29)}$
$cos B = \frac{169 + 841 - 441}{754}$
$cos B = \frac{569}{754}$

$B = cos^{-1}(\frac{569}{754}) = 41.0059$

Since we know A and B we can use
C = 180 - A - B to find C

C = 180 - A - B
C = 180 - 23.96509 - 41.0059
C = 115.0291

A = 23.9650
B = 41.0059
C = 115.0291

Round to nearest tenths.
A = 24.0
B = 41.0
C = 115.0

6 0

4 years ago

Please answer question 21

mixer [17]

7/19 If my answers correct.

8 0

4 years ago

Explain I don’t understand

Serggg [28]

So just divide 100 by 25 which equals 4 then divide 120 by 30 which also equals to 4 and if the rest equal 4 then its proportional (1)
And then same for 2 and 3 just divided the bottom by the top and if they all get the same answer they are proportion and if one is not the same then it’s not

For the grids if the dots are line diagonally straight and it starts at the 0 then it’s proportional if not then it’s not

Hope this helps :)

7 0

3 years ago

John walks from his front door to the grocery store 500m away. He walks at a

weeeeeb [17]

Answer:

10minutes

Step-by-step explanation:

500/50 equals ten

Please put brainliest

6 0

3 years ago

The sum of two times a number (x) is less than 19

Paraphin [41]

Answer:

ANSWER

Let one number = x

other number = 2x-3

(x+2x−3)+7=37

3x = 33

x = 11

∴ The two number are 11 and 19

5 0

3 years ago