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Finger [1]
3 years ago
12

If you estimate 342 ÷ 7 by using 350 ÷ 7 by using 350 ÷ 7 = 50, is 50 greater than or less than the exact answer? How did you de

cide? Is 50 an overestimate or an underestimate?
Mathematics
1 answer:
Anastasy [175]3 years ago
8 0
Its more than the exact answer because you would round 342 to 340 because 350 is an overestimate. I decided because when your rounding you only round up if the ones place value is larger than 5 but in this case its not.

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Yesterday, the price of a loaf of bread at five supermarkets was $1.44, $1.59, $1.69, $1.47, and $1.61, but today each supermark
mote1985 [20]
\frac{1.49+1.64+1.74+1.52+1.66}{5}
=\frac{8.05}{5} =1.61
3 0
3 years ago
Simplify 3 - b (7b + 2) + 3b - (11 - b)​
nirvana33 [79]

Answer: -7b² + 2b - 8

Step-by-step explanation:

<u>Given expression</u>

3 - b (7b + 2) + 3b - (11 - b)

<u>Expand parentheses and apply the distributive property if necessary</u>

=3 - b · 7b - b · 2 + 3b - 11 + b

=3 - 7b² - 2b + 3b - 11 + b

<u>Combine like terms</u>

=-7b² + (3b - 2b + b) + (3 - 11)

=\boxed{-7b^2+2b-8}

Hope this helps!! :)

Please let me know if you have any questions

8 0
3 years ago
I need to know the answers to the 3 questions in there
lina2011 [118]
What are the three question?
3 0
3 years ago
-7x - 2y = 19<br> 4x + y = -12<br> Solve the system
nalin [4]

-7x - 2y = 19

4x + y = -12

Set y equal to each other (opposite signs are fine and you could also set x equal instead of y)

-7x - 2y = 19

8x + 2y = -76

Add equations together

x = -52

Plug x value into an equation

4(-52) + y = -12

Solve for y

-208 + y = -12

y = 196

Hope this helps! ;)

4 0
3 years ago
Help help help help help
Nesterboy [21]

Answer:

b =  \sqrt{65}

Step-by-step explanation:

{b}^{2}  +  {4}^{2}  =  {9}^{2}  \\  {b}^{2} + 16 = 81 \\  {b}^{2}   = 81 - 16 \\  {b}^{2}  = 65 \\ b =  \sqrt{65}

I hope I helped you^_^

8 0
3 years ago
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