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konstantin123 [22]
3 years ago
5

a contractor uses the expression 7(x+3) to find the lenght,in feet,of chain that he needs for a certain project. Part A the cont

ractor needs four chains that are this lenght.What is the total lenght of all of the chains?
Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
4 0
Given that x is the number of chains;

7(4+3) = 7 * 7 = 49 feet
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Answer:

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3 years ago
3. Are these ratios equivalent? 35:28 and 10:8 *
attashe74 [19]

Reduce each ratio to its minimum expression to find if they are equal.

35:28

\begin{gathered} \frac{35}{28}=\frac{7\cdot5}{7\cdot4} \\ =\frac{5}{4} \end{gathered}

10:8

\begin{gathered} \frac{10}{8}=\frac{2\cdot5}{2\cdot4} \\ =\frac{5}{4} \end{gathered}

Since both ratios reduce to 5:4, they are equivalent.

Another way to check a:b is equivalent to c:d, is that a*d = b*c

In this case, this will be true if 35 times 8 is equal to 10 times 28:

\begin{gathered} 35\cdot8=280 \\ 10\cdot28=280 \end{gathered}

Since both products are equal, then the ratios are equivalent.

4 0
1 year ago
What is f(3)?<br> o 9<br> 0 -1<br> O 1<br> O 9
arlik [135]

Answer:

C.

Step-by-step explanation:

f(3) is referring to 3 on the left side and it is beside 1 which is on the left so it's 1.

4 0
3 years ago
4. Speed increases the distance required to stop.<br> A. True<br> B. False
In-s [12.5K]
The answer is true........
7 0
3 years ago
37 points! The square root of 83 can be plotted on the number line below.
Nikitich [7]

Answer:

9.1 is the nearest tenth

9.11 to the nearest hundredth

just slightly to the right of 9.1

Step-by-step explanation:

sqrt(83)

sqrt(81) = 9

So we know that it is slightly greater than 9

9.1*9.1 =81.81

9.2*9.2=84.64

9.1 is closer

9.11 * 9.11 =82.9921

9.12 * 9.12 =83.1744

9.11 is closer

7 0
3 years ago
Read 2 more answers
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