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3 years ago

Help me please please

Mathematics

1 answer:

Elina [12.6K]3 years ago

8 0

Answer: 7

Step-by-step explanation:

m∠ABC = 40°. Since BD is an angle bisector (divides the angle into two congruent angles), then m∠ABD = 20° and m∠CBD = 20°

ABD = 20 and ABD = 3x - 1

⇒ 20 = 3x - 1

⇒ 21 = 3x

⇒ 7 = x

Check:

CBD = 20 and CBD = 34 - 2x

⇒ 20 = 34 - 2x

⇒ -14 = -2x

⇒ 7 = x $\checkmark$

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Solve for n 50 points a=p(1+r/n)^rn

Andreyy89

Answer:

$n = \frac{r}{\sqrt[nt]{\frac{a}{p}} -1 }$

Step-by-step explanation:

$a=p(1+\frac{r}{n} )^{nt}$

$\frac{a}{p} =(1+\frac{r}{n} )^{nt}$

$\sqrt[nt]{\frac{a}{p}} =(1+\frac{r}{n} )$

$\sqrt[nt]{\frac{a}{p}} -1 =(\frac{r}{n} )$

$n = \frac{r}{\sqrt[nt]{\frac{a}{p}} -1 }$

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2 years ago

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Valentin [98]

Answer:

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Step-by-step explanation:

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5 0

3 years ago

Hello, I wanted an answer from a mathematician. The number 1.04 is closer to the number 1, 2, 1.25 or 1.5.

nevsk [136]

Answer:

the answer is 1

Step-by-step explanation:

1.25, 2 and 1.5 are too big compare to 1

3 0

3 years ago

There is an unknown number •it is a four digit number •the tens are double the ones •the thousands are double the tens •the sum

oksano4ka [1.4K]

Answer:

8542

Statement

1.It is a four digit number

2.The tens are double the ones

3.The thousands are double the tens

4.The sum of the digits is nineteen

Step-by-step explanation:

It is a four digit number

lets take 4 digit number-ABCD

The tens are double the ones

$C=2D$ -----------------------------1

The thousands are double the tens

$A=2C$ -------------------------------2

According to equation 1 and 2

$A=4D$

If we take

$D=1,2$

Possible number

$4B21$ OR $8B42$

The sum of the digits is nineteen

I use hit and trial method

$4B21$ - If I take B is maximum

$4+9+2+1\neq 19$

$8B42$ - If, i try to find value of B

$8+B+4+2=19$ ---------------------3

$14+B=19\\B=19-14\\B=5$

So the unknown number is- 8542

6 0

4 years ago

What is the slope-intercept form of an equation of a line perpendicular to y=2x−3 and passing through the point (5,−1)?

olasank [31]

Answer:

y=-2x+9

Step-by-step explanation:

1. Make m value opposite of og m value.

2. Then plug in variables x and y into the equation

3. Solve for b

-1 = -2(5) + b

9 = b

4. You have the answer

7 0

4 years ago