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3 years ago

How to write the number equal to 2 tens 15 ones

Mathematics

1 answer:

const2013 [10]3 years ago

8 0

2 tens & 15 ones is equal to 35

Because 2 tens = 20

15 already has a ten so add +10 to 20

30+5 is 35.

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Write an equation perpendicular to x = 5 that passes through the point (-4,3)

Neporo4naja [7]

Answer:

y-y1=m(x-x1)

y-3=5(x+4)

y-3=5x+20

y-5x+3+20=0

y-5x+23=0

7 0

3 years ago

Yuri thinks that 3/4 is a root of the following function.

sineoko [7]

Given:

The polynomial function is

$q(x)=6x^3+19x^2-15x-28$

Yuri thinks that $\dfrac{3}{4}$ is a root of the given function.

To find:

Why $\dfrac{3}{4}$ cannot be a root?

Solution:

We have,

$q(x)=6x^3+19x^2-15x-28$

If $\dfrac{3}{4}$ is a root, then the value of the function at $\dfrac{3}{4}$ is 0.

Putting $x=\dfrac{3}{4}$ in the given function, we get

$q(\dfrac{3}{4})=6(\dfrac{3}{4})^3+19(\dfrac{3}{4})^2-15(\dfrac{3}{4})-28$

$q(\dfrac{3}{4})=6(\dfrac{27}{64})+19(\dfrac{9}{16})-\dfrac{45}{4}-28$

$q(\dfrac{3}{4})=3(\dfrac{27}{32})+\dfrac{171}{16}-\dfrac{45}{4}-28$

$q(\dfrac{3}{4})=\dfrac{81}{32}+\dfrac{171}{16}-\dfrac{45}{4}-28$

Taking LCM, we get

$q(\dfrac{3}{4})=\dfrac{81+342-360-896}{32}$

$q(\dfrac{3}{4})=\dfrac{-833}{32}\neq 0$

Since the value of the function at $\dfrac{3}{4}$ is not equal to 0, therefore, $\dfrac{3}{4}$ is not a root of the given function.

4 0

3 years ago

A hot water tap filled a bath in 7 1/2 minutes,while a cold water tap fills it in 5 minutes,how long will it take to fill the ba

Kisachek [45]

Answer:

3 minutes

Step-by-step explanation:

Let's say that the bathtub is 15L

It would take 7.5 mins to fill 15L

15L/7.5 = 2L per minute

The other tap would take 5 minutes to fill 15L

15L/5 = 3L per minute

3L per minute + 2L per minute = 5L per minute

15L/5L per min = 3 minutes

Sorry for the delay. Accidentally pressed the answer button without the answer. Hope I helped.

4 0

3 years ago

Solve by either substitution or elimination. <br> 2x + 2y = 6 x + y = 4

Westkost [7]

Answer:

No solution

Step-by-step explanation:

If you were to do elimination, both the x and the y would cancel out and get 0=1, which is not true. And if you were to do it as substitution, then it would still get an answer that doesn't make sense.

7 0

3 years ago

There are 30 students in the school play. The ratio of girls to boys is 4 to 2. How many boys are in the school play?

lara31 [8.8K]

Answer:

There are 10 boys because there are double girls which would be 20 to make 30.

Step-by-step explanation:

3 0

3 years ago