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3 years ago

I have no idea how to do this problem I need help

Mathematics

2 answers:

Anettt [7]3 years ago

5 0

Answer:

PEMDAS

Step-by-step explanation:

zaharov [31]3 years ago

5 0

You would do BPEMDAS brackets pretenses exponents multiplication or division (whichever comes first) and then subtraction or addiction (which ever comes first)

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I need to know the improper fractions answers for:

zmey [24]

Answer:

Part 1) $x=\frac{15}{2}\ units$

Part 2) $z=\frac{15\sqrt{3}}{2}\ units$

Part 3) $y= \frac{15\sqrt{3}}{4}\ units$

Part 4) $b= \frac{45}{4}\ units$

Step-by-step explanation:

step 1

Find the value of x

In the large right triangle

$cos(60^o)=\frac{x}{15}$ ----> by CAH (adjacent side divided by the hypotenuse)

Remember that

$cos(60^o)=\frac{1}{2}$

substitute

$\frac{1}{2}=\frac{x}{15}$

solve for x

$x=\frac{15}{2}\ units$ ---> improper fraction

step 2

Find the value of z

In the large right triangle

Applying the Pythagorean Theorem

$15^2=x^2+z^2$

substitute the value of x

$15^2=(\frac{15}{2})^2+z^2$

solve for z

$z^2=15^2-(\frac{15}{2})^2$

$z^2=225-\frac{225}{4}$

$z^2=\frac{675}{4}$

$z=\frac{\sqrt{675}}{2}\ units$

simplify

$z=\frac{15\sqrt{3}}{2}\ units$

step 3

Find the value of y

In the right triangle of the right

$sin(30^o)=\frac{y}{z}$ ---> by SOH (opposite side divided by the hypotenuse)

substitute the given values of y and z

Remember that

$sin(30^o)=\frac{1}{2}$

$\frac{1}{2}=y:\frac{15\sqrt{3}}{2}$

solve for y

$\frac{1}{2}= \frac{2y}{15\sqrt{3}}$

$y= \frac{15\sqrt{3}}{4}\ units$

step 4

Find the value of b

In the right triangle of the right

$cos(30^o)=\frac{b}{z}$ ---> by CAH (adjacent side divided by the hypotenuse)

substitute the given values of y and z

Remember that

$cos(30^o)=\frac{\sqrt{3}}{2}$

$\frac{\sqrt{3}}{2}=b:\frac{15\sqrt{3}}{2}$

solve for y

$\frac{\sqrt{3}}{2}= \frac{2b}{15\sqrt{3}}$

$b= \frac{45}{4}\ units$

7 0

3 years ago

Which situations can be simulated using this spinner? Select three options.

oksian1 [2.3K]

Answer:

first one and the biology one

8 0

3 years ago

Pentagon VWXYZ shown on the coordinate grld. A student reflected pentagon VWXYZ across the x -axis Which describes this transfor

olga nikolaevna [1]

Answer:

(x, y) --> (x, -y)

Step-by-step explanation:

Sorry for not explaining it :/ Good Luck!

8 0

2 years ago

7th grade math help me plzzzz

timama [110]

Answer:

b, c, f are coorrect inequalities

Step-by-step explanation:

hope i helped :D

4 0

3 years ago

The total distance around Dave's rectangular-shaped bedroom is 220 feet. The width of the room is 50 feet. What is the area of D

AVprozaik [17]

Answer:

Area of rectangular bedroom = 3000 square feet

Step-by-step explanation:

It is given that the total distance around the rectangular bedroom is 220 feet

perimeter of rectangle = total distance around the rectangle

hence the perimeter of rectangle = 220 feet

now width of rectangle = 50 feet

Let us assume the length of rectangular room be L

we have formula

$perimeter = 2( length + width )$

now we plug perimeter = 220 and width = 50

so we have

$220=2(L+50)$

$110= L+50$ (divide both side by 2)

$L= 60 feet$ (subtract 50 from both side )

Area of rectangular bedroom is given by

Area = length × width

Area = 60 × 50

Area = 3000 square feet

7 0

2 years ago