All categories

3 years ago

Anyone know how to do this?

Mathematics

1 answer:

Reika [66]3 years ago

5 0

Answer:

-2x-y-15

Step-by-step explanation:

5x+3y+4-9x-8+2x-4y-11

you add the x together

5x+2x=7x

7x-9x=-2x

then yourewrite the problem

-2x+3y+4-8-4y-11

then you can solve for the y

3y-4y= -1y but you do not need to put the 1 since -y is the same as -1y

we can rewrite the problem again

-2x-y+4-8-11

4-8=-4

-4-11=-15

answer

-2x-y-15

You might be interested in

Emily spent $55 from her savings on a new dress. explain how to descibe the change Emily's savings balance in 2 different ways

Step2247 [10]

S= savings before she bought the dress s - $55 would be her new balance after she bought the dress.

We could also talk about her savings now (after her purchase). If we let n=now
n + $55 would be her balance before she bought the dress.

8 0

4 years ago

Marty is asked to draw triangles with side lengths of 4 units and 2 units, and a non-included angle of 30°. Select all the trian

777dan777 [17]

Answer:

The drawn in the attached figure

see the explanation

Step-by-step explanation:

<em>First case</em>

In the triangle ABC

Let

$a=4\ units\\b=2/ units\\B=30^o$

Applying the law of sines

Find the measure of angle A

$\frac{a}{sin(A)}=\frac{b}{sin(B)}$

substitute the given values

$\frac{4}{sin(A)}=\frac{2}{sin(30^o)}$

$sin(A)=1$

$A=90^o$

Find the measure of angle C

In a right triangle

we know that

$B+C=90^o$ ----> by complementary angles

$B=30^o$

therefore

$C=60^o$

Find the length side c

Applying the law of sines

$\frac{c}{sin(C)}=\frac{b}{sin(B)}$

substitute the given values

$\frac{c}{sin(60^o)}=\frac{2}{sin(30^o)}$

$c=2\sqrt{3}\ units$

therefore

The dimensions of the triangle are

$A=90^o$

$B=30^o$

$C=60^o$

$a=4\ units\\b=2\ units\\c=2\sqrt{3}=3.46\ units$

<em>Second case</em>

In the triangle ABC

Let

$a=4\ units\\b=2/ units\\A=30^o$

Applying the law of sines

Find the measure of angle B

$\frac{a}{sin(A)}=\frac{b}{sin(B)}$

substitute the given values

$\frac{4}{sin(30^o)}=\frac{2}{sin(B)}$

$sin(B)=0.25$

using a calculator

$B=14.48^o$

Find the measure of angle C

we know that

The sum of the interior angles in any triangle must be equal to 180 degrees

$A+B+C=180^o$

$A=30^o\\B=14.48^o$

therefore

$30^o+14.48^o+C=180^o$

$C=135.52^o$

Find the length side c

Applying the law of sines

$\frac{c}{sin(C)}=\frac{a}{sin(A)}$

substitute the given values

$\frac{c}{sin(135.52^o)}=\frac{4}{sin(30^o)}$

$c=5.61\ units$

therefore

The dimensions of the triangle are

$A=30^o$

$B=14.48^o$

$C=135.52^o$

$a=4\ units\\b=2\ units\\c=5.61\ units$

see the attached figure to better understand the problem

4 0

3 years ago

Sheila is flying a kite with 250 feet of her string let out. The angle the kite line makes with a line parallel to the ground is

Svetach [21]

The altitude of the kite:
h = 5 + 250 · sin 45°
h = 5 + 250 · √2 / 2
h = 5 + 250 · 0.7071 = 5 + 176.77 = 181.77 ≈ 182 ft
Answer: The altitude is 183 ft.

8 0

3 years ago

Read 2 more answers

The dolphins are feed 64 buckets of fish each day. The penguins are feed 1/8 as many buckets of fish as the dolphins. How many b

Sav [38]

Answer:

Step-by-step explanation:

You just gotta divide 64 by 8

4 0

3 years ago

TIMED PLEASE HELP ASAP! MULTIPLE CHOICE, BRAINLIEST FOR CORRECT ANSWER!

erma4kov [3.2K]