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4 years ago

5

Figure ABCD is a square. Angle B measures 15 x minus 30 degrees. Find the value of x.

1 answer:

Yuliya22 [10]4 years ago

3 0

A square has four 90° angles. So:

15x-30=90 add 30 to both sides

15x=120 divide both sides by 15

x=8°

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Help me substitution method define variables

Rina8888 [55]

$\left \{ {{S=14+L} (I) \atop {S+L=124}(II)} \right.$

<span>Substitute (I) into (II), we have:
</span> $S+L=124$
$(14+L)+L=124$
$14 + 2L = 124$
$2L = 124 - 14$
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$L = \frac{110}{2}$
$\boxed{L = 55}$

<span>Replace (II) in (I), we have:
</span> $S=14+L$
$S = 14+ 55$
$\boxed{S = 69}$

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3 years ago

diamong [38]

1.

c² = n²

√c² = √n²

c = n

2.

if

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3 years ago

Read 2 more answers

I'll. ark brainlyest and give a lot of points for answering this right

valina [46]

Answer:

$\displaystyle T'( 2,4)$

$\displaystyle U'( 1,1)$

$\displaystyle S' ( 3,2)$

Step-by-step explanation:

we current vertices of the given triangle

$\displaystyle T( - 2,4)$
$\displaystyle U( - 1,1)$
$\displaystyle S ( - 3,2)$

remember that,

$\rm\displaystyle(x,y) \xrightarrow{ \rm reflection \: over \: y - axis}( - x,y)$

so we obtain:

$\rm\displaystyle \: T( - 2,4) \xrightarrow{ \rm reflection \: over \: y - axis}T'( 2,4)$

$\rm\displaystyle \: U( - 1,1) \xrightarrow{ \rm reflection \: over \: y - axis}U' ( 1,1)$

$\rm\displaystyle S( - 3,2) \xrightarrow{ \rm reflection \: over \: y - axis}S'( 3,2)$

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3 years ago

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Rufina [12.5K]

Answer:

B

Step-by-step explanation:

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3 years ago

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Korvikt [17]

Answer:

On the graphing calculator, use the function normCdf, where

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upper bound = 210
mean = 250
standard deviation = 46

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3 years ago