Chen uses different strategies to add. He works with the addends 4,5,6,7

Dado un triángulo rectángulo cuyo perímetro es de 48 cm, la diferencia entre su lado mayor y su lado menor es de 8 cm y su área

lesya692 [45]

Answer:

5471002836nmcncm.....

5 0

2 years ago

When multiplying numbers in scientific notation you blank the coefficients and substract the exponents?

34kurt

For the sake of example, let's multiply the two numbers $2.3 \times 10^5$ and $3.5 \times 10^7$ together. Altogether, we have:

$2.3\times10^5\times3.5\times10^7$

Rearranging the expression, we can group the exponents and coefficients together:

$2.3\times3.5\times10^5\times10^7$

Multiplying each out, we notice that since $10^5$ and $10^7$ have the same base (10), multiplying them has the effect of adding their exponents, which leaves us with:

$2.3\times3.5\times10^{5+7}=8.05\times10^{12}$

The takeaway here is that multiplying two numbers in scientific notation together has the effect of multiplying its coefficients and adding its exponents.

8 0

3 years ago

Please help me find the volume

SSSSS [86.1K]

Answer:

C,. 3 3/4

Step-by-step explanation:

length times with times hight

1 1/4 x 1 1/2 x 2

convert everything to same denominator

1 1/4

1 2/4

1 4/4

solve

1 1/4 x 1 2/4 x 1 4/4

4 0

3 years ago

A central angle of a circle measures 42 degrees. What else can be shown to measure 42 degrees?

Slav-nsk [51]

Answer:

Vertically opposite angles

Step-by-step explanation:

Given

$\theta = 42^\circ$

Required

What else can measure $\theta = 42^\circ$

The question has missing options. So, I will give a general explanation.

Using the attached image as a point of reference.

Given that:

$\theta = 42^\circ$

The value of b is calculated as:

$b = \theta$

Because b and $\theta$ are vertically opposite angles

This gives:

$b = 42^\circ$

So, one possible answer to the question is a vertically opposite angle

4 0

3 years ago

Solve the initial value problem where y′′+4y′−21 y=0, y(1)=1, y′(1)=0 . Use t as the independent variable.

igor_vitrenko [27]

Answer:

$y = \frac{7}{10} e^{3(t - 1)} + \frac{3}{10}e^{-7(t - 1)}$

Step-by-step explanation:

y′′ + 4y′ − 21y = 0

The auxiliary equation is given by

m² + 4m - 21 = 0

We solve this using the quadratic formula. So

$m = \frac{-4 +/- \sqrt{4^{2} - 4 X 1 X (-21))} }{2 X 1}\\ = \frac{-4 +/- \sqrt{16 + 84} }{2}\\= \frac{-4 +/- \sqrt{100} }{2}\\= \frac{-4 +/- 10 }{2}\\= -2 +/- 5\\= -2 + 5 or -2 -5\\= 3 or -7$