I need to know how to multiply integers.
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4 x 5 = 20
I think its the same way you multiply normal numbers.
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Amina sees a discount of 5% on a laptop. She can calculate the amount she has to pay for the laptop using the expression b – 5/100 b, where b isthe price of the laptop before the discount. If the price after discount is $494, which number from the set {500, 505, 510, 520, 525} is the value of b?
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Answer:
y-intercept = - 15/2
Step-by-step explanation:
5x-4y=30
-4y = -5x + 30
y = -5x/-4 + 30/-4
y = 5x/4 - 15/2
y-intercept = - 15/2
Answers
3. -0.113(-4x - 4) = 0.452x + 0.452 0.113 times 4 is 0.452, but you need to make sure to have the correct signs. Since the product is positive and -0.113 is negative, you would have to multiply it by a negative to get the product.
If you're having trouble with multiplying by fractions, just use repeated addition in your head. For example, for the first problem, instead of trying to tackle 3/4 times 4, think 3/4 + 3/4 + 3/4 + 3/4.
3/4 + 3/4 = 6/4
6/4 + 3/4 = 9/4
9/4 + 3/4 = 12/4
12/4 = 3
For the second problem, when multiplying by a decimal, just do what you'd normally do for multiplication. When you get to the end, count how many digits you had behind the decimal before, and put the decimal in the corresponding space for the answer.
0.113
x 4
0452
There are 3 digits behind the 0 in 0.113, so there should be 3 digits behind the decimal in the answer. So, the answer should be 0.452.
Hope this helps!
Please help me with these two questions.
Answers
The first one, you take (x,y) both times 3
A(1,1) to A(3,3)
B(-1,1) to B(-3,3)
C(1,-1) to C(3,-3)
D(-1,-1) to D(-3,-3)
The second one, you take (x,y) both times 2
A(4,1) to A(8,2)
B(4,3) to B(8,6)
C(1,2) to C(2,4)
That is how I think you do it. I hope that I helped you.
Find the length of the side of the smaller square. So subtract the x-values from each other.
1-(-1)=2
The length of the square is 2.
Now find the length of the bigger square.
3-(-3)=6 (You can also just count the units between the two points.)
Now divide the length of the bigger triangle by the length of the smaller triangle to find the scale factor used to dilate the object.
The scale factor is 3.
18)
Find the base of the larger triangle.
The y-value for point B is 6 and the y-value for point A is 2. Just subtract to find the length of BA.
6-2=4
Now find the base of the smaller triangle.
The y-value for point B is 3 and the y-value for point A is 1. Just subtract to find the length of B'A'.
3-1=2
Divide the base of the smaller triangle by that of the larger triangle.
The scale factor is 1/2.
_____________________________________________________
Now you might be wondering why I divided the smaller triangle by the larger one but I didn't follow the same procedure for the squares. If you look closely, the smaller triangle is the new figure after the scale factor dilation while the larger square is the new figure after the scale factor dilation. Just look at the coordinates. The coordinates for a changed figure always has an apostrophe at the end of it. The bigger square in question 17 has the apostrophes so I knew that the larger square was the new figure after the dilation. And the smaller triangle in question 18 has the apostrophes so I knew that the smaller triangle was the new figure after the dilation.
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Answers
3.Frank bought a Game Square for $43.20 during Game World's Semi-Annual Gaming Blowout. If the original price of the Game Square is $180.00, which percent of discount below is closest to the percent of discount that Frank received?
4.Mrs. Davidson rode 300 miles on a passenger train. It took her 5 hours to reach her destination. What was the average speed of her train?
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You then add these together, and this gives you $15.70
2. For this, you've got to add the percentage decrease (10/.01) to 1, and then multiply $45.26, and this gives you $49.786 (essentially $50 rounded)
3. You've got to divide the smaller number (43.20) by the larger number (180), and this gives you 0.24, and you've then got to multiply this by 100, giving you 24%. Therefore, he received a 76% discount.
4. The best thing to do here is to divide the larger number (300) by the smaller number (5), and this gives you 60, therefore, the average speed of the train is 60 miles per hour.
Hope this helps :)