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3 years ago

What is the answer pleas tell me

Mathematics

1 answer:

tangare [24]3 years ago

5 0

Answer:

i believe its B,C, and E

Step-by-step explanation:

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A man can drive a motorboat 70 miles down the Colorado River in the same amount of time that he can drive 40 miles upstream. Fin

pochemuha

The speed of the current is 40.34 mph approximately.

SOLUTION:

Given, a man can drive a motorboat 70 miles down the Colorado River in the same amount of time that he can drive 40 miles upstream.

We have to find the speed of the current if the speed of the boat is 11 mph in still water. Now, let the speed of river be a mph. Then, speed of boat in upstream will be a-11 mph and speed in downstream will be a+11 mph.

And, we know that, $\text{ distance } =\text{ speed }\times \text{ time }$

$\begin{array}{l}{\text { So, for upstream } \rightarrow 40=(a-11) \times \text { time taken } \rightarrow \text { time taken }=\frac{40}{a-11}} \\\\ {\text { And for downstream } \rightarrow 70=(a+11) \times \text { time taken } \rightarrow \text { time taken }=\frac{70}{a+11}}\end{array}$

We are given that, time taken for both are same. So $\frac{40}{a-11}=\frac{70}{a+11}$

$\begin{array}{l}{\rightarrow 40(a+11)=70(a-11)} \\\\ {\rightarrow 40 a+440=70 a-770} \\\\ {\rightarrow 70 a-40 a=770+440} \\\\ {\rightarrow 30 a=1210} \\\\ {\rightarrow a=40.33}\end{array}$

8 0

3 years ago

Let f(x)= - 3x - 1 and g(x)=x2 + 2. Find (fog)(-6).

Leona [35]

Answer:(Fog)(-6)=29

Step-by-step explanation:

(fog)=-3(2x+2)-1

=-6x-6-1

=-6x-7

(fog)(-6)= -6(-6)-7

=36-7

=29

6 0

3 years ago

1 2 3 4 5 6 7 8 9 10 In what type of economy does the government try to control all factors of production? A. traditional B. com

kondaur [170]

Answer: C. market

Step-by-step explanation:

8 0

2 years ago

Help with number 10 please

vladimir2022 [97]

Answer:

If he is traveling over 85 miles its cheaper to use company a

Step-by-step explanation:

137-65= 72

72÷0.85= 84.7058823529= 85

So after 85 miles company A is cheaper

5 0

3 years ago

State what additional information is required in order to know that the triangles are congruent for the reason given. If possibl

Inessa05 [86]

Answer:

TX ≅ WX

Step-by-step explanation:

Required condition for SAS is two sides and the included angle must be congruent.

We have:

RX ≅ YX

We observe:

∠RXT ≅ ∠YXW

We need:

TX ≅ WX

This will complete the information required for SAS congruence statement.

5 0

2 years ago