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Marina86 [1]
3 years ago
7

What is -5(2a+3b) simplified

Mathematics
2 answers:
masha68 [24]3 years ago
8 0

Answer:

-10a-15b

Hope this helps!!!!

valentina_108 [34]3 years ago
5 0

Answer:

<h3>-10a - 15b</h3>

Step-by-step explanation:

- 5(2a + 3b)

Expand : Use -5 to open the bracket

- 5 \times 2a =  - 10a \\  - 5 \times 3b =  - 15b \\  \\  - 10a - 15b

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the length of a rectangular garden is 3 m greater than the width. The area of the garden is 70m squared. find the dimensions of
Lerok [7]
A = l x w

so you know that the length is 3m longer than the width, so you could use a formula to represent that

w = l + 3

you then substitute the second equation into the first to solve for l

70 = l x (l +3)
70 = l^2 + 3l

you could then rearrange the formula and solve for l using the quadratic formula 

0 = l^2 + 3l - 70

l = -3 +- (square root (3)^2 - 4(1)(70)) / 2(1)
l = -3 +- (square root 9 + 280) / 2
l = -3 +- (square root 289) / 2
l = -3 +- 17 / 2

then you solve for the two seperate roots

l = -3 + 17 /2
l = 14 / 2
l = 7

or 

l = -3 - 17 / 2
l = -20 / 2
l = -10

since a length cannot be negative, this root is not viable. therefore l = 7

to solve for w you would use

w = l + 3
w = 7 + 3
w = 10 

hope this helps! if you did not understand a step or concept please let me know!
4 0
3 years ago
A dime and a quarter are placed on one side of a balance scale. A half-dollar is placed on the other side. Which side of the sca
kirill115 [55]

Answer:

It would have to be 25 dimes

Step-by-step explanation:

4 0
2 years ago
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laura spends 4 hours reading a book that is 76 pages long. what is the average number of pages she read per hour?
Studentka2010 [4]

The average number of pages she reads per hour is 19 pages per hour

<h3>How to determine the average number of pages she read per hour?</h3>

The given parameters are:

Number of pages = 76 pages

Number of hours = 4 hours

The average number of pages she reads per hour is calculated using the following formula

Average = Number of pages/Number of hours

Substitute the known values in the above equation

Average = 76 pages/4 hours

Evaluate the quotient

Average = 19 pages per hours

Hence, the average number of pages she reads per hour is 19 pages per hours

Read more about average at:

brainly.com/question/20118982

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1 year ago
Order these from least to greatest -[4], [-4], [2], [-8]
iren [92.7K]
-[4]   [2]    [-4]    [-8]
mark me brainliest if i right ty :))
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3 years ago
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Jammal makes a cut through a block of florist's foam, as shown. What are the dimensions of the exposed cross section?
Ahat [919]

Answer:

C. 3 in x 6 in

Step-by-step explanation:

Jammal cuts the block in a straight line parallel to one side... so the section revealed when he finishes his cut will be identical as the parallel side to which the cut is done.

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The answer is then 3 inches y 6 inches. The thickness of the block (5 inches) has no impact on the exposed area of the cross-section.

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