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4 years ago

40% of what number is 26

Mathematics

2 answers:

tatyana61 [14]4 years ago

7 0

<span>Divide 26 by 0.4 and get 65.</span>

Goshia [24]4 years ago

4 0

26 is 40% of 65

40 % = $\frac{26}{x} * 100$ divide both sides by 100
0.40 = $\frac{26}{x}$
x = $\frac{26}{0.4}$
x= 65

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The perimeter of a rectangular painting is 344 centimeters. If the width of the painting is 79 centimeters, what is its width?

WINSTONCH [101]

Answer:

the equation is 2(l+w) so we do 2(93+w)=344 getting the answer of 79

Step-by-step explanation:

i think im 100 percent correct i took the test on flvs if I'm wrong just let me know

5 0

3 years ago

The value of x in the equation log(x-1)9=2 is

mel-nik [20]

$\log_{(x-1)} 9=2$

the domain:
$x-1 >0 \ \land \ x-1 \not=1 \\
x>1 \ \land \ x \not= 2 \\
x \in (1; 2) \cup (2;+\infty)$

the equation:
$\log_{(x-1)}9=2 \\
(x-1)^2=9 \\
\sqrt{(x-1)^2}=\sqrt{9} \\
|x-1|=3 \\
x-1=3 \ \lor \ x-1=-3 \\
x=4 \ \lor \ x=-2$

4 is in the domain
-2 is not in the domain

The answer:
$x=4$

***
Also, the answer in 13 is {8}. -3 is not in the domain. Replace x with -3 and you'll see:
$x=\sqrt{5x+24} \\
-3=\sqrt{5 \times (-3)+24} \\
-3=\sqrt{-15+24} \\
-3=\sqrt{9} \\
-3=3$
It's not true so -3 isn't a solution to this equation.

4 0

3 years ago

Read 2 more answers

8x/10x-2 equals 5x+3/7x solve for x

Andrews [41]

<u>Answer:</u>

x = $\frac{1}{3}$ & 3

<u>Step-by-step explanation:</u>

$\frac{8x}{10x-2}$ = $\frac{5x+3}{7x}$

Cross multiply:

$\frac{8x}{10x-2}$ = $\frac{5x+3}{7x}$ ⇒ (8x)(7x) = (5x+3)(10x-2)

Simplify both sides:

(8x)(7x) = (5x+3)(10x-2) ⇒ 56x² = 50x²+20x-6

Set equation equal to 0:

56x² = 50x²+20x-6 ⇒ 0 = -6x²+20x-6

Factor the trinomial:

0 = -6x²+20x-6 = (-6x+2)(x-3)

Solve for X:

-6x+2 = 0

-6x = -2

x = $\frac{1}{3}$ ;

x-3 = 0

x = 3;

x = $\frac{1}{3}$ , 3

4 0

3 years ago

Suppose in a class of 60 students 5 have no siblings, 26 have one sibling, 14 have two siblings, and 15 have three siblings. Cal

Otrada [13]

The relative frequency of students who have three siblings is 25% given that there are 60 students in a class in which 5 have no siblings, 26 have one sibling, 14 have two siblings and 15 have three siblings. This can be obtained by using the formula for relative frequency.

<h3>What is the relative frequency of students who have three siblings?</h3>

Given that,

total number of students in the class = 60

number of students who have no sibling = 5

number of students who have 1 sibling = 26

number of students who have 2 sibling = 14

number of students who have 3 sibling = 15

Formula for relative frequency = f/n, where f is the number of times the data occurred, n is the total number of frequencies.

Therefore,

relative frequency of students who have three siblings = 15/60 = 0.25

In percentage ⇒ 0.25 × 100 = 25%

Hence the relative frequency of students who have three siblings is 25% given that there are 60 students in a class in which 5 have no siblings, 26 have one sibling, 14 have two siblings and 15 have three siblings.

Learn more about relative frequency here:

brainly.com/question/16832475

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2 years ago

There are four paths from the cabin to the lake. How many ways can you walk from the cabin to the lake and back?

Vsevolod [243]

You can take four ways

3 0

3 years ago