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Ivenika [448]
2 years ago
9

Expand the expression (5x + 3)2, and write the result in standard form.

Mathematics
1 answer:
Nikolay [14]2 years ago
3 0

Expand

2 × 5x + 2 × 3

Simplify 2 × 5x to 10x

10x + 2 × 3

Simplify 2 × 3 to 6

<u>= 10x + 6</u>

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Answer:

A.

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Step-by-step explanation:

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Mark and some of his friends had eaten pizzas. What is this written as a decimal?
Varvara68 [4.7K]

Answer:

We don't really have the whole question, but to convert to a decimal, you should divide the numerator by the denominator.

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Convert 5/8 to a decimal.

5 divided by 8 = 0.625

7 0
3 years ago
ten granola bars and 12 bottles of water cost $23. 5 granola bars and four bottles of water cost $10. how much do one granola ba
pishuonlain [190]

Answer:

2.15

Step-by-step explanation:

Let g= cost of granola bars

b = cost of bottles of water


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I will solve this system by elimination

Multiply the second equation by -2


-2(5g +4b) = -2*10

-10g -8b = -20

Now we add this equation to the first equation to eliminate  g

-10g -8b = -20

10g+12b =23

---------------------

   4b = 3

b = 3/4

A bottle of water = $.75

Now we need to find g

5g+4b =10

5g +4(.75) = 10

5g +3 = 10

Subtract 3 from each side

5g +3-3 = 10-3

5g =7

Divide by 5

5g/5=7/5

g = 7/5

g = 1 2/5

g =1.40


We want the cost of one bottle of water and 1 granola bar

1g + 1b

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2.15

4 0
2 years ago
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The perimeter of a rectangle is 46 in and the diagonal is 17 in. Find the area of the rectangle.
OlgaM077 [116]
P=2*(L+l)=46
L+l=46:2
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L^2+l^2=289

so 289+2l*L=529
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l*L=240:2
A=120 


5 0
3 years ago
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Korvikt [17]

Answer:

y = 4

Step-by-step explanation:

(2/3 + 4) + (-3/2y + 1/3y) = 0

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-9/6y + 2/6y = -14/3

-7/6y = -14/3

cross-multiply:

-21y = -84

y = 4

7 0
2 years ago
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