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inessss [21]
3 years ago
11

PLEASE HELP IT'S 7TH GRADE MATH... MIGHT BE EASY FOR YOU

Mathematics
1 answer:
sineoko [7]3 years ago
7 0
1) X+12

2) 2x-5

3) 40-x

4) (x1/3)(12)

5) x0.25

6) 2x:4y

7) 12(x-1)

8) 3[(x)(-8)]

9) 7(2x+3)

10) (x-30)+(y-30)
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What is a bird favorite type math
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Answer:

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Step-by-step explanation:

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6 0
3 years ago
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.

<u>SOLUTION: </u>

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
Consider the following equation. cos x = x3 (a) Prove that the equation has at least one real root. f(x) = cos x − x3 is continu
skelet666 [1.2K]

Answer:

b. 0.86, 0.87

Step-by-step explanation:

a. Find attached solution to a

4 0
3 years ago
How do i do this question? someone help
lesya [120]
There are 360 degrees in the rhombus which means the equilateral triangles has 180 degrees (because it is half the rhombus and also it is the angle sum of a triangle). It is equilateral meaning all sides and angles are the same so they all must be 60 (180/3)
Now this must mean that angle a is equal to the opposing angle being 60
8 0
3 years ago
HELP PLEASE
ankoles [38]

Answer:

1. certain

2.15/31

3.40%

4.unlikely

8 0
3 years ago
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