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2 years ago

6

Solve the algebraic expression word problem if there are 15 less boys than girls in a class then how many girls are there in the

class

1 answer:

xeze [42]2 years ago

7 0

Answer: b+15 = g

Step-by-step explanation:

g = girls

b= boys

t= total students

If you wanted to solve it a different way you would do this:

(b + 15) + b = t

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Tan^2x+sec^2x=1 for all values of x. <br> true or false?

amid [387]

This is not true.

$\tan^2x+\sec^2x=\dfrac{\sin^2x}{\cos^2x}+\dfrac1{\cos^2x}=\dfrac{1-\cos^2x+1}{\cos^2x}=2\sec^2x-1$

$2\sec^2x-1=1\implies\sec^2x=1\implies\sec x=\pm1\implies x=n\pi$

where is $n$ is any integer. So suppose we pick some value of $x$ other than these, say $x=\dfrac\pi4$ . Then

$\tan^2\dfrac\pi4+\sec^2\dfrac\pi4=1+2=3\neq1$

5 0

2 years ago

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It's from the chapter : "exponents and powers"<br>i need the workings too<br>please help

labwork [276]

Answer:

505/19

Step-by-step explanation:

Easy

so [3^3-(1/2)^(-3)*(1/19)]

simplify

3^3-8/19

3^3=27

27-8/19

convert element to fraction

(27*19)/19-8/19

combine

(27*19-8)/19

505/19

Have a wonderful day ask me if you have more questions about MATH that goes for anyone who needs math help

5 0

2 years ago

What is the slope<br> 19,-16<br> -7,-15

zubka84 [21]

$\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
&({{ 19}}\quad ,&{{ -16}})\quad 
% (c,d)
&({{ -7}}\quad ,&{{ -15}})
\end{array}
\\\\\\
% slope = m
slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ y_2}}-{{ y_1}}}{{{ x_2}}-{{ x_1}}}\implies \cfrac{-15-(-16)}{-7-19}\implies \cfrac{-15+16}{-7-19}
\\\\\\
\cfrac{1}{-26}\implies -\cfrac{1}{26}$

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3 years ago

Math help!!!!!!!!!!!! will mark brainly

vfiekz [6]

Answer:

It would be 9.17%

Step-by-step explanation:

7 0

3 years ago

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Write in lowest terms: 7x2 - 13x - 2<br> 27x2 - 6x - 1

Ksju [112]

So... get the like-terms and add/subtract $7x^2-13x-2+27x^2-6x-1
\\ \quad \\
\textit{add/subtract the like-terms}
\\ \quad \\
\boxed{7x^2+27x^2}\quad \boxed{-13x-6x}\quad \boxed{-1-2}$

see what that gives you

8 0

2 years ago