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3 years ago

What is the solution to the equation 1.25 + r = 4? r = 2.75 r = 3.75 r = 5.25 r = 5.75

Mathematics

2 answers:

eimsori [14]3 years ago

4 0

Answer:

r = 2.75

Step-by-step explanation:

1.25 + r = 4

Subtract 1.25 on both sides.

1.25 + r - 1.25 = 4 - 1.25

r = 4 - 1.25

r = 2.75

The solution to the equation is r = 2.75.

Paul [167]3 years ago

3 0

Answer:

r= 2.75

Step-by-step explanation:

In order to find r, you need to make it the subject:

so when you rearrange the equation it will be

r=4-1.25

= 2.75

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Kira exercises no less than 40 minutes per day. Use t to represent Kira's amount of exercise (in minutes per day).

VikaD [51]

Kira's time exercising every day can be represented as t ≥ 40 because she exercises for 40 minutes or more.

<h3>How can this situation be represented?</h3>

This situation can be represented with an inequality. An inequality is an expression that is used to represent variables. This type of expression uses symbols such as >, < or ≥ to represent different variable values.

<h3>What inequality is represented in this situation?</h3>

The expression is: t ≥ 40

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1 year ago

Ms Patil bought 4 packs of pencils for her class.Then she bought 3 more packs of pencils. There are 12 pencils in a pack. How ma

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3 years ago

Does reversing the order of digits of a 2 digit prime number always result in a prime number

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2 years ago

Read 2 more answers

The product of a particular number and a second value, which is given by the sum of 8 and the original number, is 65. What is th

Marina86 [1]

Given:

The product of a particular number is 65.

Second value is given by the sum of 8 and the original number.

To find:

The unknown number.

Solution:

Let x be the unknown number.

Then, second number = x+8

The product of a particular number is 65.

$x\times (x+8)=65$

$x^2+8x=65$

$x^2+8x-65=0$

Splitting the middle term, we get

$x^2+13x-5x-65=0$

$x(x+13)-5(x+13)=0$

$(x-5)(x+13)=0$

Using zero product property, we get

$x-5=0$ and $x+13=0$

$x=5$ and $x=-13$

So, the unknown number is either 5 or -13.

Therefore, the correct option is B.

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2 years ago

Find the surface area of the composite figure.

zhuklara [117]

Answer:

438.97 cm²

Step-by-step explanation:

To find the surface area, we break up the figure into two pieces(blue and yellow) and then add them together.

SA = 2(w · l + h · l + h · w)

2 · (6 · 16 + 4 · 16 + 4 · 6)

368 cm²

70.97 cm² + 368 cm²

438.97 cm²

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2 years ago