3 years ago

If x = 2 and y = 5 , evaluate the following expression: 20 + 2 ( 3 y − 4 x )

Mathematics

1 answer:

Ghella [55]3 years ago

3 0

20+2(3(5)-4(2))

20+2(15-8)

20+2(7)

20+14

You might be interested in

What expression would simplify to 9x+y+6

Montano1993 [528]

3x+3x+3x+y+3*2 ?

I only seperated the variabled number

5 0

4 years ago

What is the oppisite of 0.7?

sergey [27]

Answer: negative 0.7

Step-by-step explanation:because you are looking for the opposite if you make a number line

5 0

4 years ago

8 + 5n = -72 Solve the equation.

HACTEHA [7]

6 0

4 years ago

Read 2 more answers

Can someone please help me? i hope you can see this omg

Gemiola [76]

Step-by-step explanation:

length = (2x + 3) units

width = (x - 7) units

Area = 2( length × width)

Area = 2( (2x + 3) × (x - 7) )

Area = 2( 2x² - 14x + 3x - 21)

Area = 2 ( 2x² -11x - 21)

Area = 4x² - 22x - 42

3 0

4 years ago

Read 2 more answers

A woman is q years old while her son is p years old. the sum of their ages is equal to twice the difference of their ages. the p

Allisa [31]

Step-by-step explanation:

Given

$q + p = 2(q - p)$

as equation 1.

I used q-p as the difference as logically the woman will be older than her son.

Also given,

$qp = 675$

as equation 2.

Using equation 2,

$q = \frac{675}{p}$

substitute this equation into equation 1.

$\frac{675}{p} + p = 2( \frac{675}{p} - p) \\ \frac{675}{p} + p = \frac{1350}{p} - 2p \\ \frac{675}{p} - \frac{1350}{p} = - 2p - p \\ - 3p = - \frac{675}{p} \\ - 3p \times p = - 675 \\ - 3 {p}^{2} = - 675 \\ {p}^{2} = - 675 \div - 3 \\ {p}^{2} = 225 \\ p = \sqrt{225} \\ = 15$

Substitute P into equation 2.

$15q = 675 \\ q = 675 \div 15 \\ = 45$

Therefore the woman is 45 years old while her son is 15 years old.

3 0

3 years ago