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4 years ago

-12x4m8n 6x5m-10n-6

Mathematics

2 answers:

Yuki888 [10]4 years ago

7 0

Answer:

whats the qeustion

Step-by-step explanation:

nikklg [1K]4 years ago

6 0

What’s the question ?

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The quadrilaterals ABCD and JKLM are similar.

PilotLPTM [1.2K]

Answer:

x=3.5

Step-by-step explanation:

2.8/4=x/5

cross multiply

2.8(5)=4x

14=4x

x=14÷4

x=3.5

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3 years ago

The city's central library has 72,864 books. The library has 72 bookcases. If each bookcase has room for the same number of book

sesenic [268]

1012 books per book case

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4 years ago

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In the diagram, AD=CD=CB and measure of angle A=40°. How many degrees are in angle DCB?

Ad libitum [116K]

Answer:

$20^{\circ}$

Step-by-step explanation:

Consider triangle ACD. This triangle is isosceles triangle, because AD = DC. Angles adjacent to the base AC are congruent abgles, so

$m\angle DAC=m\angle DCA=40^{\circ}$

The sum of the measures of all interiror angles in the triangle is always $180^{\circ},$ then

$m\angle DAC+m\angle DCA+m\angle ADC=180^{\circ}\\ \\40^{\circ}+40^{\circ}+m\angle ADC=180^{\circ}\\ \\m\angle ADC=180^{\circ}-40^{\circ}-40^{\circ}=100^{\circ}$

Angles ADC and BDC are supplementary angles (add up to $180^{\circ}$ ), then

$m\angle BDC=180^{\circ}-100^{\circ}=80^{\circ}$

Consider triangle BCD. This triangle is isosceles triangle because BC = DC. Angles adjacent to the base BD are congruent abgles, so

$m\angle BDC=m\angle DBC=80^{\circ}$

The sum of the measures of all interiror angles in the triangle is always $180^{\circ},$ then

$m\angle DBC+m\angle BDC+m\angle BCD=180^{\circ}\\ \\80^{\circ}+80^{\circ}+m\angle BCD=180^{\circ}\\ \\m\angle BCD=180^{\circ}-80^{\circ}-80^{\circ}=20^{\circ}$

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3 years ago

Need help to find X<br> thank you

Scilla [17]

Answer:

121

Step-by-step explanation:

5 0

3 years ago

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Find the value of x in the triangle.

Musya8 [376]

The answer is 38 degrees because for every triangle, the angles add up to 180 and the small square on the triangle represents it is a right triangle, which has 90 degrees. 38 + 52 + 90 = 180

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3 years ago

-12x4m8n 6x5m-10n-6​

-12x4m8n 6x5m-10n-6