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3 years ago

I need help with 15 & 14

Mathematics

1 answer:

grandymaker [24]3 years ago

8 0

Answer:

14. Agree. Draw one that is 2 by 21.

15. 192

Step-by-step explanation:

14.) I agree. This parallelogram has an area of 6*7 = 42. Drawing a parallelogram with side lengths which two numbers (not 6 and 7) that multiply to 42 would have the same area. 2 * 21 = 42. You can draw a parallelogram that is 2 by 21 and it will have the same area.

15.) The area of a parallelogram is found by A = b*h. Since the base and height are 8 and 3, then the area is 8*3 = 24. One parallelogram is 24. Since there are 8 in total to make the shape, then the area is 8*24 = 192.

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Convert 3.25 to a fraction

Lunna [17]

3 and one 1/4 or 13/4

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3 years ago

Five cupcakes and two cookies cost $19.75. Two cupcakes and four cookies cost $ 17.50.

alina1380 [7]

Answer:

Step-by-step explanation:

Let x and y represent the cost of a cupcake and cookie respectively.

Given that;

Five cupcakes and two cookies cost $19.75.

$5x+2y=19.75 ---------- 1$

Two cupcakes and four cookies cost $17.50.

$2x+4y=17.50 --------------2$

Let's solve the simultaneous equation by elimination;

Multiply equation 1 by 2;

$10x+4y=39.50-------3\\$

Subtract equation 2 from equation 3;

$10x-2x+4y-4y=39.50-8x=22$

$8x=22$

divide both sides by 8

$\frac{8x}{8} =\frac{22}{8} \\x=2.75$

Since we have the value of x, let substitute into equation 1 to get y;

$5x+2y=19.75\\5(2.75)+2y=19.75\\13.75+2y=19.75\\2y=19.75-13.75\\2y=6\\y=\frac{6}{2} \\y=3.00$

therefore , the cost of cupcakes and cookies are;

$cupcakes= 2.75\\cookies= 3.00$

PLEASE MARK ME AS BRAINLIEST

6 0

2 years ago

£3 is €4. <br> Convert £30 to euros.

makvit [3.9K]

40 euros if u convert it

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2 years ago

How many solutions can be found for the equation 5x + 3(x − 1) = 10x − x − 5? (4 points)

Svet_ta [14]

Answer:

The correct option is b.

Step-by-step explanation:

To find the number of solutions, we need to solve the equation:

$5x + 3(x - 1) = 10x - x - 5$

Let's group all the "x" on the equation.

$5x + 3x - 10x + x = 3 - 5$

Now, let's solve for "x".

$-x = -2$

$x = 2$

Therefore, the equation has one solution. The correct option is b.

I hope it helps you!

8 0

2 years ago

Please Help i will give the brainliest!

Dmitriy789 [7]

Answer:

<em>See below</em>

Step-by-step explanation:

In this example we are to consider the equation 2x - 5 = 4x + 12, and are asked to solve for x. Well let us take the first approach, a mathematical one;

$2x - 5 = 4x + 12,\\- 5 = 2x + 12,\\- 17 = 2x,\\\\x = - 17 / 2 = - 8.5\\\\Conclusion, x = - 8.5 / x = - 8 and 1 / 2$

Now consider the explanation, " talking over a phone to a friend. "

First you would subtract 2x on either side of the equation, canceling the 2x on one side, and subtracting 2x from 4x on the other, resulting in the simplified equation - 5 = 2x + 12. Subtracting 12 from either side we cancel the 12 on one side, and subtract - 12 and - 5 on the other. We now get - 17 = 2x. Dividing 2 on either side, x = - 8.5!

7 0

3 years ago