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3 years ago

The perimeter of a rectangle is 150cm. The length is 15cm greater than the width. Find the dimensions

1 answer:

7 0

150/4 = 37.5cm. You divide by four because there are four sides on a rectangle. But 37.5 is the cm of a square. Since it says one of the sides is 15cm greater, you subtract 37.5 - 15 = 27.5cm on 2 of the width. While the other 2 lengths are greater than the width by 15 cm, so you add 15 to 37.5 which gives you 52.5cm. So the 2 width are 27.5cm and the length is 52.5cm.

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The gap is selling shirts for 30% off the original price. The shirts are on sale for $22.40. What was the original price of the

svet-max [94.6K]

If you would like to know what was the original price of the shirt, you can calculate this using the following steps:

30% + 100% = 130%

130% of $22.40 = 130% * 22.40 = 130/100 * 22.40 = $29.12

The original price of the shirt was $29.12.

5 0

2 years ago

177*((177+(9-4+7)) +90/8=

larisa86 [58]

Answer:

33464.25

Step-by-step explanation:

Using BODMAS : brackets, division, multiplication, addition

$177\times ((177+(9-4+7)) +\frac{90}{8}\\\\177\times (177+12) +\frac{90}{8}\\\\177\times 189 +\frac{90}{8}\\\\\\177 \times 189 + 11.25\\\\33453 + 11.25\\\\33464.25$

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2 years ago

The height of a triangle is 3cm less than twice the base. The area is 10cm2

Kamila [148]

Answer:

The base is 4cm and the height is 5cm.

Step-by-step explanation:

This is a solve the system question. Call H the height of the triangle and B the base. The question tells us:

$H=2B-3$

and

$\frac{B \times H}{2}=10$

Sub the first equation into the second (as H is already isolated). You will end up with a quadratic equation - solve that any way you wish (e.g. quadratic formula). I've provided the factored form below which shows you the roots:

$\frac{B(2B-3)}{2}=10\\\frac{2B^2-3B}{2}=10\\2B^2-3B=20\\2B^2-3B-20=0\\(2B+5)(B-4)=0\\B= - \frac{5}{2},4$

In this question, we take B=4. You can't have a negative side length so the other answer is eliminated. Now sub the value for B into either of the original equations. I'll use the first, again because H is already isolated:

$H=2(4)-3\\H=8-3\\H=5$

3 0

3 years ago

True or false? Someone plz help me !!! I’ll cash app you 30$ plz !

arlik [135]

Answer:

true

Step-by-step explanation:

3 0

3 years ago

A square has a side of 10x.simplify an expression for the perimeter of a square

ludmilkaskok [199]

4(10x)
or
4×10x

im sorry if this is incorrect..i tried

3 0

3 years ago