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3 years ago

Find the percent increase or decrease: 43 to 78

Mathematics

1 answer:

Kobotan [32]3 years ago

3 0

Answer:

81.39% increase.

Step-by-step explanation:

Given: There is change in number from 43 to 78.

First lets find the amount of change or difference in number.

Difference in number= $78-43= 35$

∴ Difference in number show that there is an increase of 35 number.

Now, finding the percent change in the number.

Percent= $\frac{Difference\ in\ number}{base\ number} \times 100$

⇒ Percent change in number= $\frac{35}{43} \times 100= 81.39\%$

∴ 81.39% increase in the number.

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Help me here in this equation and tell me how to check it to know if solution is the answer

Leokris [45]

ok so first step is to get rid of x

than you want to subtract x from 4/5x

than you want to minus 7 from 9 and you get 2

now times 5 to both sides like like this

4/5x5 and 2x5=

4x=10

x=2.5

i hope this helps you

$\frac{4}{5} x \frac{5}{1} = \frac{4}{1} =4x$

then you have $2 x 5= 10$

so then you will have $4x=10\\10divide by 4 =\\2.5\\x=2.5$

4 0

4 years ago

Triangle WXY is isosceles. ∠YWX and ∠YXW are the base angles. YZ bisects ∠WYX. m∠XYZ = (15x)°. m∠YXZ = (2x + 5)°. What is the me

NARA [144]

Step-by-step explanation:

angle YWX = angle YXW ...eqn 1

angle XYZ = angle WYX (0.5) = 15x...eqn 2

angle YXZ = angle YXW = 2x + 5...eqn 3

=> from eqn 1 and 3 we get...

angle YWX = 2x + 5 ...eqn 4

=> from eqn 2 we get

angle WYX = 2 × angle XYZ = 30x...eqn 5

a triangle has a total of 180deg,

=>angle WYX + angle YWX + angle YXW = 180deg

=> 30x + 2x +5 + 2x +5 = 180deg

=> 34x +10 =180deg

=> x = 5deg

subst x = 5deg in eqn 5, we get

angle WYX = 30 × 5 = 150deg

4 0

4 years ago

Read 2 more answers

HELP I NEED A ANSWER ASAP

Gnesinka [82]

Answer:

x=-19

Step-by-step explanation:

x-5=2x+14

-x=19

x=-19

6 0

2 years ago

Simplify the expression (4-5i)(2+6i)-(3-2i) show your work.

Anastaziya [24]

The simplification of the given expression $(4-5i)(2+6i)-(3-2i)$ , we get $-30i^2+16i+5$ .

Given expression is:

$(4-5i)(2+6i)-(3-2i)$

By applying the multiplication, we get

→ $(8-10i+24i-30i^2)-(3-2i)$

By multiplying the (-) sign into the bracket, we get

→ $8-10i+24i-30i^2-3+2i$

→ $5+16i-30i^2$

By arranging the terms, we get

→ $-30i^2+16i+5$

Thus the answer above is right.

Learn more:

brainly.com/question/19593573

4 0

3 years ago

Read 2 more answers

What’s the derivative of the function: A) f(x)= 1/x , in point 2. B) f(x)= 5x^2 , in point 3

bija089 [108]

Using the power rule, the derivatives are given as follows:

a) $f^{\prime}(2) = -\frac{1}{4}$ .

b) $f^{\prime}(3) = 30$ .

<h3>What is the power rule for a derivative?</h3>

Suppose we have a power function given by:

$f(x) = x^n$

The derivative of the function is given by:

$f^{\prime}(x) = n \times x^{n-1}$

Item a:

The function is:

$f(x) = \frac{1}{x} = x^{-1}$

Then the derivative is:

$f^{\prime}(x) = -x^{-2} = -\frac{1}{x^2}$

When x = 2, the derivative is:

$f^{\prime}(2) = -\frac{1}{4}$

Item b:

The function is:

$f(x) = 5x^2$

Then the derivative is:

$f^{\prime}(x) = 10x$

When x = 3, the derivative is:

$f^{\prime}(3) = 30$

More can be learned about derivatives at brainly.com/question/2256078

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5 0

2 years ago