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3 years ago

15

Sharon needs 3.5 yards or fabric to make a dress for herself and 2.25 yards of the same fabric to make a matching dress for her

daughter, if she buys 6.5 yards of fabric, how much will she have left over?

1 answer:

maks197457 [2]3 years ago

8 0

Answer:

.75 yards

Step-by-step explanation:

6.5 - 3.5 - 2.25 = .75

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-x+ y = 12<br> x-2y=3<br><br> Please help

grigory [225]

Answer:

x=-27, y=-15

Step-by-step explanation:

In the attached file

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2 years ago

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Solve the following triangle in which given sides are<br> a=7 b=7 c=9

blagie [28]

We have an isosceles triangle;
A=opposite angle side a.
B=opposite angle side b.
C=opposite angle side c.

A=B
Method 1:

We can divide the isosceles triangle in two right triangles,
hypotenuse=7
side=9/2=4.5

B=A=arccossine (4.5/7)=49.994799...º≈50º
C/2=90º-50º=40º ⇒ C=2*40º=80º

Answer:
a=7; A=50º
b=7; B=50º
<span>c=9; C=80º

Method 2:
Law of cosines:
a²=b²+c²-2bcCosA ⇒CosA=(a²-b²-c²)/(-2bc)
CosA=(49-49-81) / (-126)=0.642857
A=arco cos (81/126)≈50º

B=A=50º

A+B+C=180º
50º+50º+C=180º
C=180º-100º
C=80º

Answer:

</span>a=7; A=50º
b=7; B=50º
<span>c=9; C=80º</span>

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3 years ago

Find the value of x in the triangle shown below

CaHeK987 [17]

Answer:

<h2>46.4°</h2>

Step-by-step explanation:

Apply sine formula:

$\frac{sin \: a}{a} = \frac{sin \: b}{b} = \frac{sin \: c}{c}$

$\frac{sin \: a}{a} = \frac{sin \: c}{c}$

Plug the values

$\frac{sin \: (88)}{6.9} = \frac{sin \: x}{5}$

Apply cross product property

$5 \: sin \: (88) = 6.9 \: (sin \: x)$

$\frac{5 \: sin \: (88)}{6.9} = sin \: x$

$x = {sin}^{ - 1} ( \frac{5 \: sin \:( 88)}{6.9} )$

$x = 46.4$

Hope this helps .....

Best regards!!!

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3 years ago

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104,185 miles is the area of Colorado

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3 years ago

6.7 times 10^-5 in standard form

alexdok [17]

Answer:

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Step-by-step explanation:

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