All categories

3 years ago

Simplify the question :(4−5y)−2(3.5y−8)

Mathematics

1 answer:

BabaBlast [244]3 years ago

7 0

Answer:

$-12y+20$

Step-by-step explanation:

$\left(4-5y\right)-2\left(3.5y-8\right)$

Use distributive property.

$-2\left(3.5y-8\right)$

$-2\cdot \:3.5y-\left(-2\right)\cdot \:8$

$-7y+16$

$4-5y-7y+16$

Now, add like terms.

$-5y-7y=-12y$

$\:4+16=20$

$-12y+20$

You might be interested in

If B =1-6w2 and A = 1+ w, find an expression that equals 2B – A in<br> standard form.

pychu [463]

Answer:

I am also still waiting for the answer, if you do find it PLEASE let me know!

Step-by-step explanation:

5 0

2 years ago

A ladder is leaning up against a 17 foot Wall at an angle of elevation of 37°. How far is the foot of the latter from the wall?

inn [45]

This is the concept of trigonometry, the distance from the foot of the ladder will be given by:
tan theta=[opposite]/[adjacent]
opposite=17 ft
adjacent=x ft
theta=37°
thus
tan 37=17/x
x=17/tan 37
x=22.56 ft
=22.6 ft (to the nearest 10th of a foot)

6 0

3 years ago

PLEASE HELP ME!!!!!!!!!!!!!!!!!!

lilavasa [31]

Answer:

a) 4 - $vt - d = \frac{1}{2} at^{2}$

b) 1 - $2(vt - d) = at^{2}$

c) 6 - $\frac{2(vt - d)}{t^{2}} = a$

Step-by-step explanation:

It simply asks the steps to go from the original displacement formula to isolate a (the acceleration). It's just a matter of moving items around.

We start with:

$d = vt - \frac{1}{2} at^{2}$

We then move the vt part on the left side, then multiply each side by -1 (to get rid of the negative on the at side and to match answer choice #4):

$vt - d = \frac{1}{2} at^{2}$

Then we multiply each side by 2 to get rid of the 1/2, answer #1:

$2(vt - d) = at^{2}$

Finally, we divide each side by t^2 to isolate a (answer #6):

$\frac{2(vt - d)}{t^{2}} = a$

4 0

3 years ago

The value of -9(square root) is not-3 because

love history [14]

Answer:

A) $(-3)^{2} \neq -9$