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GenaCL600 [577]
2 years ago
8

5. Use the vertical method to multiply two trinomials.

Mathematics
2 answers:
spayn [35]2 years ago
6 0
Answer:

19x^2-2x+2

Step by step explanation:
Novay_Z [31]2 years ago
4 0

Answer:

i think the answer is 19x^-2x+2

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A boat traveled 210 miles downstream and back. The trip downstream took 10 hours. The trip back took 70 hours. What is the speed
musickatia [10]

Try this solution:

Answer: 6 & 4.5 (m-per-h)

Step-by-step explanation:

- The basic formula used in this task is S=V*t, where S - distance, V - speed, t - time.

- the downstream speed is: V+Vc, where V - the speed of the boat in still water, Vc - the speed of the current.

- the upstream speed is: V-Vc.

- according to the described above the distance for downstream is S1=(V+Vc)*t1, where t1=10; the distance for upstream is S2=(V-Vc)*t2, where t2=70.

- for whole travel down- and upstream: S=S1+S2.

- Using these it is possible to make up the system of the equations:

\left \{ {{(70(V-V_c)=10(V+V_c)} \atop {70(V-V_c)+10(V+V_c)=210}} \right.

V - the speed of the boat in still water - 6 miles per hour, Vc - the speed of the current - 4.5 miles per hour. All the details for the system of the equations are in the attachment.

4 0
3 years ago
If you could just refresh me on how to do this, thanks.
Masteriza [31]
I'm pretty sure it's D
8 0
3 years ago
Find BC. leave your answer in a simplified form
Anettt [7]

Answer:

D) 2√5

Step-by-step explanation:

Pythagorean Theorem

a^2 + b^2 = c^2

2^2 + 4^2 = c^2

4 + 16 = c^2

20 = c^2

√20 = √c^2

2√5 = c

3 0
3 years ago
Read 2 more answers
What is 23+ 23+76+87+90
Karolina [17]

Answer:

the answer is 299. Brainliest ????please???

8 0
3 years ago
Read 2 more answers
What is the answer to the equation 4•(12-z)=44
mixas84 [53]

Answer:4z=-4

Step-by-step explanation:So you do distributive property 4×12 is 48 four times is 40 then you do 4Z +48 equals 44 then you subtract 48 from both sides because it’s edition so you change it to subtraction then once you subtract 48 from both sides 44 subtracted by 48 is -4 so for Z equals -4

5 0
3 years ago
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