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3 years ago

If Hector is 8 years old and Mary is 3 years old how old will Mary be when Hector is 16

Mathematics

1 answer:

IRINA_888 [86]3 years ago

7 0

Okay so 8 (hector) - 3(Mary) = 5 years apart
So, 16 (hector) - 5 (years apart) = 11 (Mary’s age)

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Plz help ASAP! I will mark brainliest if correct

MaRussiya [10]

A = L^2
A = L^2 = 2^2 + 4^2 (Pythagorean’s theorem)
A = L^2 = 20
Therefore the area of the square is 20 units square.

5 0

3 years ago

Read 2 more answers

If 8x+22=19x, then 3x=

Leni [432]

Answer:

Step-by-step explanation:

- *x both sides

divide eleven both sides

x =2

3 times 2 is six

7 0

4 years ago

Read 2 more answers

Use basic trigonometric identities to simplify the expression: 2 sin (x) cos (x) sec (x) csc (x) = ?

photoshop1234 [79]

Answer:

$2sin(x)*cos(x)*sec(x)*csc (x)=2$

Step-by-step explanation:

Remember the identities:

$sec(x)=\frac{1}{cos(x)}\\\\csc(x)=\frac{1}{sin(x)}$

Ginven the expression:

$2sin(x)*cos(x)*sec(x)*csc (x)$

You need to substitute $sec(x)=\frac{1}{cos(x)}$ and $csc(x)=\frac{1}{sin(x)}$ into it:

$2sin(x)*cos(x)*sec(x)*csc (x)=2sin(x)*cos(x)*\frac{1}{cos(x)}*\frac{1}{sin(x)}$

Now, you need to simplify.

Remember that:

$\frac{a}{b}*\frac{c}{d}=\frac{a*c}{b*d}$

And:

$\frac{a}{a}=1$

Then, you get:

$=\frac{2sin(x)*cos(x)}{cos(x)*sin(x)}}=2$

5 0

3 years ago

3(4x-9)+4=2(5x-7)+2

allochka39001 [22]

19.5 you can use photo math for math problems like this

6 0

3 years ago

For what value of X is the rational expression below equal to zero

stealth61 [152]

Answer:

Step-by-step explanation:

Step-by-step explanation:

if you divide 0 by any number you will get 0!!!

if you will substitute x for 2 you will have:

2-2/2+2 = 0/4 = 0

3 0

3 years ago