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fomenos
4 years ago
15

What is this? anyone help​

Mathematics
1 answer:
qwelly [4]4 years ago
4 0

Answer:

-a^2 -a -35

Step-by-step explanation:

a(4-a) -5(a+7)

Distribute

4a -a^2 -5a-35

Combine like terms

-a^2+4a -5a-35

-a^2 -a -35

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The perimeter of a rectangular field is 364 yards. If the width of the field is 85 yards, what is its length?
Solnce55 [7]

Answer:

\huge\boxed{97 yards}

Step-by-step explanation:

Important Information:

Perimeter of rectangle=Lenght+Length+width+width

Method:

The first step to work this out is to  multiply the width of 85 by 2, this gives you 170.This is because a rectangle has two sets of equal sides. This means that there two widths.

The next step is to subtract 170 from the perimeter of 364, this gives you 194. This is because the formula for the perimeter of a rectangle isLenght+Length+width+width. This means that in order to isolate the values of the lenght we must subtract the values of the width.

The final step is to divide the value of 194 by 2, this gives you 97. This is because that is the value for 2*the length. That means in order to work out the value of 1 you would need to divide by 2.

Step By Step:

1) Multiply 85 by 2.

85*2=170

2) subtract 170 from 364.

364-170=194

3) Divide 194 by 2.

194/2=97

4 0
3 years ago
A carpenter purchased 50 ft of redwood and 70 ft of pine for a total cost of $280. A second purchase, at the same prices, includ
iris [78.8K]

The cost per foot of redwood and of pine is $3.5 and $1.5 respectively.

<h3>How to solve simultaneous equation?</h3>

let

  • cost of redwood = x
  • cost of pine = y

50x + 70y = 280

100x + 60y = 440

Multiply (1) by 2

100x + 140y = 560

100x + 60y = 440

subtract to eliminate x

80y = 120

y = 120/80

y = $1.5

substitute y = 1.5 into (1)

50x + 70y = 280

50x + 70(1.5) = 280

50x + 105 = 280

50x = 280 - 105

50x = 175

x = 175 / 50

x = $3.5

Learn more about equation:

brainly.com/question/2972832

#SPJ1

4 0
2 years ago
Which unit of measurement would be the most appropriate unit to measure the thickness of a quarter?
damaskus [11]

I think the answer is millimeter

5 0
4 years ago
Read 2 more answers
Alexa claims that 16 ÷ 4, 32/8, and 8 halves are all equivalent expressions. Is Alexa correct? Explain how you know.
emmasim [6.3K]

they all equal 4, so yes Alexa is correct.

4 0
3 years ago
Please help with this question!!
mars1129 [50]

Answer:

second one

Step-by-step explanation:


7 0
3 years ago
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