All categories

3 years ago

There are 78 students in the fourth grade 39 of them are girls

Mathematics

2 answers:

Zepler [3.9K]3 years ago

6 0

What is the rest of the problem or equation ?

ira [324]3 years ago

5 0

Answer:

This means that the answer is 39

Step-by-step explanation:

if u subtract 78 from 39 u get 39 just as if u add 39 + 39= 78.

You might be interested in

Someone help me with this if you know the answer swipe up

zhuklara [117]

The answers would be A & E, or, 90° clockwise and also 270° counterclockwise:)

5 0

2 years ago

Define the height of a triangle use the words vertex and base.

yaroslaw [1]

Answer: The height of a triangle is the perpendicular segment that joins the base with its opposite vertex.

Step-by-step explanation:

The base can be any side of the triangle.

8 0

2 years ago

How to Graph 3(x-2)2+6

BARSIC [14]

Answer:

n/a

Step-by-step explanation:

it just needs more work on the vertex.

3 0

3 years ago

A watch cost $75.99. If the sales tax rate is 6.25%, what is the amount of sales tax?

Luden [163]

75.99*0.0625=4.75 hope helps

7 0

3 years ago

How to solve this :') please help

blsea [12.9K]

Answer:

3/2

Step-by-step explanation:

sin(3π/4 - β) = sin(3π/4)cosβ - cos(3π/4)sinπ =

$\sin(\frac{3\pi}{4}-\beta)=\sin(\frac{3\pi}{4})\cos\beta-\cos\frac{3\pi}{4}\sin\beta\\=\frac{1}{\sqrt{2}}\cos\beta-(-\frac{1}{\sqrt{2}})\sin\beta\\\\=\frac{1}{\sqrt{2}}(\cos\beta +\sin\beta)\\\\\sin^2(\frac{3\pi}{4}-\beta)=\frac{1}{2}\cos\beta +\sin\beta)^2=\frac{1}{2}(\cos^2\beta +\sin^2\beta+2\sin\beta\cos\beta\\=\frac{1}{2}(1+\sin2\beta)=\frac{1}{2}(1-\frac{1}{5}) = \frac{2}{5}\\$

Use $\cot^2x=\csc^2x-1=\frac{1}{\sin^2x}-1$

$\cot^2(\frac{3\pi}{4}-\beta)=\frac{1}{\sin^2(\frac{3\pi}{4}-\beta)}-1 = \frac{1}{\frac{2}{5}}-1=\frac{5}{2}-1=\frac{3}{2}$

7 0

2 years ago