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Gekata [30.6K]
2 years ago
6

You earned a 84% on a science test. You

Mathematics
1 answer:
Vlada [557]2 years ago
6 0
84/100 = 21/?
(100 * 21)/84 = 25
There were 25 questions on the test.
You might be interested in
1.)Painting Jane is painting one wall of her living room. The wall is rectangular, 13 feet wide by 9 feet high. What is the area
antiseptic1488 [7]

Answer:

1. 117 ft^{2}

2. 54 ft^{2}

3. 1,428 ft^{2}

4. 644 ft^{2}

5. 4,700 ft^{2}

6. 57,600 ft^{2}

Step-by-step explanation:

First use A = w*l

w = width

l = length

It doesn't have to be A = w*l, it could be A = l*w.   It will be the same answer.

1.  3 ft * 9 ft = 117 ft^{2}

2. 3 ft * 18 ft = 54 ft^{2}

3. 42 ft * 34 ft = 1,428 ft^{2}

4. 23 ft * 28 ft = 644 ft^{2}

5. 94 ft * 50 ft = 4,700 ft^{2}

6. 360 ft*160 ft = 57,600 ft^{2}

3 0
2 years ago
in 1930 the average cost for a gallon of gasoline was $0.25. in 2007 the average cost for a gallon of gasoline is $2.60 what is
AlekseyPX
Hello! The first thing to do is to find the amount of change by subtracting both numbers. 2.60 - 0.25 is 2.35. Now, we set up a proportion by doing change/original = x/100. With the values plugged in, it would be written like this: 2.35/0.25 = x/100. Cross multiply the values in the proportion. When you do, you get 235 = 0.25x. Now, divide each side by 0.25 to isolate the "x". When you do that, x = 940. The price of gas has gone up 940% since 1930.
7 0
2 years ago
Read 2 more answers
What is the simplified form of x2 • y–3 • x4
Alex787 [66]
<span>x^2 • y^–3 • x^4
= x^6 / y^3</span>
3 0
3 years ago
Read 2 more answers
Given the function f defined by formula f(x)=2x+1 find the following f(4)
Nezavi [6.7K]
The correct answer you need will equal 9
6 0
2 years ago
A girl found dress fo £65.50 and there was an 15% sale on
Alika [10]

Answer: $65.50 - 15% = 55.675


Step-by-step explanation:

Conversion a decimal number to a fraction: 65.50 = 655

10

= 131

2

Conversion a decimal number to a fraction: 9.825 = 9825

1000

= 393

40

Subtract: 65.5 - 9.825 = 131

2

- 393

40

= 131 · 20

2 · 20

- 393

40

= 2620

40

- 393

40

= 2620 - 393

40

= 2227

40


The common denominator you can calculate as the least common multiple of the both denominators - LCM(2, 40) = 40

4 0
2 years ago
Read 2 more answers
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