3 years ago

Solve -2.5n + 8.7 > 5.45. n < 1.3 n > 1.3 n < -5.66 n > -5.66

Mathematics

2 answers:

AVprozaik [17]3 years ago

8 0

5.45-8.7= -3.5
-3.5÷-2.5= 1.3

Since you divided by a negative number switch the signs. So it would be A. the first one

Pepsi [2]3 years ago

8 0

Subtract the 8.7 from the 5.45. then you have -2.5n>-3.25. divide the -2.5 to both sides. it's dividing by a negative, so the sign flips and you get, n<1.3 as your answer

You might be interested in

A 12 foot ladder is placed 5 feet from the base of the building. About how high does the ladder reach?

Mariulka [41]

Answer:

7 foot

Step-by-step explanation:

8 0

3 years ago

An inverted pyramid is being filled with water at a constant rate of 25 cubic centimeters per second. The pyramid, at the top, h

UNO [17]

Answer:

$\frac{225}{16} cm/s$

Step-by-step explanation:

We are given that

$\frac{dV}{dt}=25cm^3/s$

Side of base=4 cm

l=w=4 cm

Height,h=12 cm

We have to find the rate at which the water level rising when the water level is 4 cm.

Volume of pyramid= $\frac{1}{3}lwh=\frac{1}{3}l^2h$

$\frac{l}{h}=\frac{4}{12}=\frac{1}{3}$

$l=\frac{1}{3}h$

Substitute the value

$V=\frac{1}{27}h^3$

Differentiate w.r.t t

$\frac{dV}{dt}=\frac{3}{27}h^2\frac{dh}{dt}$

Substitute the values

$25=\frac{1}{9}(4^2)\frac{dh}{dt}$

$\frac{dh}{dt}=\frac{25\times 9}{16}=\frac{225}{16} cm/s$

5 0

3 years ago

Help pls don't answer if you don't know also I’ll give brainliest

il63 [147K]

Evaluate for x=4,y=4,z=4

|(2)(4)−4+(3)(4)|

=16

Answer=16

(PLEASE GIVE BRAINLIEST)

8 0

3 years ago

Pls help am failing <br> Hehehehgshdhdjsjbsvdv

ludmilkaskok [199]

Answer:

should be B

Step-by-step explanation:

7 0

3 years ago

Find the unknown. 531 = ( × 6) + 21

sladkih [1.3K]

The answer would be x = 85

3 0

3 years ago

Read 2 more answers