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babymother [125]
3 years ago
7

Which expression is equal to (3 × 5) × 4?

Mathematics
2 answers:
laila [671]3 years ago
6 0

Answer:

c

Step-by-step explanation:

did the test :)

Nady [450]3 years ago
4 0
The answer should be C
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Help quick!!!!! I cannot figure it out, help.<br><br>(Both)
Sladkaya [172]

Answer:

a. 21x-2

b. -28x-2

c. 7b-35x-2

Step-by-step explanation:

a. f(3)

7(3x)-2

21x-2

b. f(-4)

7(-4x)-2

-28x-2

c. f(b-5)

7(b-5x)-2

7b-35x-2

4 0
4 years ago
A submarine is descending to examine the seafloor 2,100 feet below the surface. It takes the submarine 2 hours to make this desc
iVinArrow [24]

Answer:

The answer should be -1050 because -2100-0/2-0 would equal -1050.

7 0
2 years ago
Read 2 more answers
(09.05 MC) Derek kicks a soccer ball off the ground and in the air, with an initial velocity of 31 feet per second. Using the fo
ivann1987 [24]
In order to find the maximum of the function, we have to find the roots of the first derivative. 
H(t)=-16t^2+vt+s\\ H'(t)=-32t+v=0\\ v=32t\\ t=\frac{v}{32}=\frac{31}{32}=0.97s
This gives us the time at which the ball reaches its maximum height. 
We don't know s. We can find it because we know that at t=0 the ball is on the ground and its height has to be zero.
H(0)=0=-16(0)^2+v(0)+s\\ s=0
Finally, we can find the maximum height:
H(0.97)=-16(0.97)^2+31\cdot 0.97=15.0156 \simeq15$ft
The answer is C.
4 0
4 years ago
Read 2 more answers
Out of 1,400 students, 60% have a dog. How many students have a dog in part ?
Stells [14]

Answer:

840 students

Step-by-step explanation:

0.6 * 1400 = 840 students

8 0
3 years ago
Read 2 more answers
(3+1/2) ×12. multiple or divide​
taurus [48]

Answer:

(3+1/2) x 12 = 42

Step-by-step explanation:

3 0
3 years ago
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