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3 years ago

Helpppp plsssssssss !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

2 answers:

Maslowich3 years ago

6 0

Answer:

He is wrong.

Step-by-step explanation:

This indicates a percent increase in the amount of time he spends doing homework:

% increase = $\frac{amount.of.increase.from.initial.amount.to.current}{initial.amount} * 100$

% increase = $\frac{5}{20} * 100$

% increase = 25%

Meaning that he spent 100%+25% = 125% of the time he spent on homework last week.

Hence, he is wrong.

Nikitich [7]3 years ago

3 0

Answer:

Yes, he is correct

Step-by-step explanation:

25% of 20 is 5 (0.25*20)

100% of 20 is 20

if you take 125% of 20, you'll end up with 25

You might be interested in

X varies directly with Y and Z. x = 40 when y = 10 and Z = 20. find X when y = 30 and Z = 40.

sp2606 [1]

Answer:

x = 60

Step-by-step explanation:

Direct variation is of the form

y= kxz

We know x =40 and y =10 and z= 20

10 = k * 40 * 20

10 = k * 800

Divide each side by 800

10/800 = k

1/80 = k

The equation becomes

y = 1/80 xz

Let y = 30 and z = 40 and find x

30 = 1/80 * x * 40

30= 40/80 x

30 = 1/2x

Multiply each side by 2

2 * 30 = 2 * 1/2 x

60 = x

6 0

3 years ago

Solve for x. 4x-4< 8 AND 9x +5 > 23 is it a, b,c or d ?

Alex

Answer:

$A)\displaystyle2 < x < 3$

Step-by-step explanation:

A compound inequality is an inequality that combines two simple inequalities

we are given that

$\displaystyle 4x - 4 < 8 \ \: \text{and} \: \: 9x + 5 > 23$

solving x for the first equation:

$\displaystyle 4x - 4 < 8$

add 4 to both sides:

$\displaystyle 4x < 12$

divide both sides by 4 and since we are dividing both sides by a positive number the inequality won't swap

$\displaystyle x < 3$

solving x for the second equation:

$\displaystyle 9x + 5 > 23$

cancel 5 from both sides:

$\displaystyle 9x > 18$

divide both sides by 9 and since we are dividing both sides by a positive number:

$\displaystyle x > 2$

therefore by combining the equations we obtain:

$\displaystyle\boxed{2 < x < 3}$

hence,

our answer is A)

5 0

3 years ago

What is #13 asking me to do?

patriot [66]

You need to calculate miles per gallon.

Number of miles is just the difference in the odometer:
----> 23,927 - 23,672 = 255

Number of gallons = 16.5

MPG = 255/16.5 = 15.5

4 0

3 years ago

Dividing monomials please help and quick!!

Snezhnost [94]

Answer:

answer is of left to right

16x^14/(36x^2)=4x^12/9

(3^3)×(x^5)×y÷4

-9a^3(b^5)

7 0

3 years ago

The Factored form of 4a^3 b^5-16a^5 b^2+ 12a^2 b^3

iren [92.7K]

Answer:

Step-by-step explanation:

4a³b⁵ - 16a⁵b² + 12a²b³ = 4a³b⁵ - 4*4*a⁵b² + 4*3*a²b³

= 4a²b² * (ab³ - 4a³ + 3b )

8 0

3 years ago