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dedylja [7]
3 years ago
6

Question 3 please NO spam math grade 7

Mathematics
2 answers:
Alexeev081 [22]3 years ago
4 0

Answer:

Step-by-step explanation:

1. right

2. right

3. right

4. right

5. wrong

6. right

im not 100% sure but this is what i think

pychu [463]3 years ago
3 0

Answer: The answer is A and D

Step-by-step explanation:

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POSSIBLE POINTS: 2
serious [3.7K]

Answer:  max capacity is 1625 gallons.

Diagram is shown below.

=========================================================

Explanation:

We'll draw two horizontal number lines to help make a comparison or connection between percentages and tank capacity.

For the top number line, make 5 sections with the labels: 0%, 20%, 40%, 60%, 100%. The reason I'm picking 5 is because 40% = 40/100 = 2/5. So having 40% capacity means we're 2/5 full. That denominator 5 tells us how to subdivide each number line.

The bottom number line will also have 5 sections. We only know one label for this bottom portion right now. That label is 650. Place this directly under the "40%". This visually is one way to represent that 650 gallons is 40% filled. See the diagram below.

Cut the 650 in half to get 325. This corresponds to 40% cut in half to get 20%. Therefore, 325 will go under the 20%. Being 20% full means we have 325 gallons of water.

To figure out the 60% portion, we will multiply 325 by 3. This is because 3*20% = 60%, so 3*325 = 975. We'll write "975 gallons" under the "60%"

Then we have 1300 gallons under the 80% since 4*325 = 1300. Note how 4*20% = 80%, so that's where the '4' multiplier comes from.

Finally, we multiply 325 by 5 to get 1625 and that represents the full tank's capacity. Technically we could have just jumped to this directly without having to find the 60% or 80% capacity values, but it's good practice I think.

Again the diagram is shown below. The answer we're after is at the very bottom right corner. It's under the 100% to indicate the tank is completely full, or has reached max capacity.

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

Here's a way to find the answer without a double number line. This method involves setting up a proportion.

(40% full)/(650 gallons) = (100% full)/(x gallons)

40/650 = 100/x

40x = 650*100

40x = 65000

x = 65000/40

x = 1625

We confirm that the tank's max capacity is 1625 gallons.

4 0
3 years ago
Find the measure of side a
matrenka [14]

Answer:

8.22899353m

= 8m(round)

Step-by-step explanation:

14 * sin(36 degree) = 8.22899353

5 0
3 years ago
Help this question question
Step2247 [10]

Answer:

-65 i suppose

Step-by-step explanation:

7 0
3 years ago
What is the size of the picture reducing it by 1/25 original size 75 by 50
Svetradugi [14.3K]
50/1 * 1/25 = 50/25 = 2

75/1 * 1/25 = 75/25 = 3

The reduced painting is 2cm x 3cm
5 0
3 years ago
A line intersects the points
allochka39001 [22]

Answer:

The answer would be -5. Hopefully I'm not wrong.

3 0
2 years ago
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