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3 years ago

Keiko started an assignment at 5:28 PM and finished it at 6:52 PM.

Mathematics

2 answers:

Scrat [10]3 years ago

8 0

Hi there!

1:28

1.Add extra hour into first term:

$5:28=6:28$

Now there is 1 hour..

2.Subtract the two terms in minute place:

$52-28=24$

3.Combine the terms:

$1:00+24=1:24$

Therefore, Keiko took 1:28 minute on the assignment.

Bumek [7]3 years ago

5 0

Answer:

It took her 84 minutes (or 1 hour and 24 minutes) to finish.

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Using Substitution 4x-3y=-10 and x=1/4y-1

Alinara [238K]

Answer:

Then the solution is (-1/4, 3)

Step-by-step explanation:

Start by eliminating the fractional coefficient 1/4: multiply all 3 terms in the second equation by 4. This results in equation (b), below:

4x - 3y = -10 (a)

4x = y -4 (b)

Substitute y - 4 for 4x in equation (a):

y - 4 - 3y = -10

Combining like terms, we get -2y = -10 + 4, or -2y = -6, or y = 3.

Since x = (1/4)y - 1, if y = 3, then x = (1/4)(3) - 1, or x = 3/4 - 1, or x = -1/4

Then the solution is (-1/4, 3)

7 0

3 years ago

Do you distibute the -2 through first or the exponent?

frozen [14]

The exponent is always first PENDAS

8 0

3 years ago

Help please. I’m stuck on this one

Nastasia [14]

Answer:

b = 25m

Step-by-step explanation:

Hi there!

We're given angle B and the length of a in this right triangle. We must solve for the length of b. a and b are the two legs of the right triangle.

In this case, we can use the tangent ratio:

$tan\theta=\displaystyle\frac{opposite}{adjacent}$

Plug in the given information:

$tan\displaystyle\frac{\pi}{4} =\displaystyle\frac{b}{25}\\\\25tan\displaystyle\frac{\pi}{4} =b\\\\b=25$

Therefore, b = 25m.

We can also use this using special triangle rules. $\displaystyle\frac{\pi}{4}$ radians is equal to 45 degrees, making this a 45-90-45 triangle. This would make a and b equal in length.

I hope this helps!

5 0

3 years ago

X 2-7x + 10 whats the outcome if x=-3

Lynna [10]

I hope this helps you

7 0

4 years ago

Read 2 more answers

Okie help help math math math

liraira [26]

Answer:

$\displaystyle y = -3x + 9$

Step-by-step explanation:

First, find the rate of change of the line:

$\displaystyle \frac{-y_1 + y_2}{-x_1 + x_2} = m \\ \\ \frac{-6 + 3}{-1 + 2} = m \hookrightarrow \frac{-3}{1} = m \\ \\ \boxed{-3 = m}$

_______________________________________________

Now plug all the information into the Slope-Intercept Formula. It does not matter which ordered pair is chosen:

$\displaystyle 3 = -3[2] + b \hookrightarrow 3 = -6 + b; 9 = b \\ \\ \boxed{\boxed{y = -3x + 9}} \\ \\ OR \\ \\ 6 = -3[1] + b \hookrightarrow 6 = -3 + b; 9 = b \\ \\ \boxed{\boxed{y = -3x + 9}}$

I am joyous to assist you at any time.

3 0

3 years ago