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Nina [5.8K]
3 years ago
12

-10 + x =18 please help meee

Mathematics
2 answers:
algol [13]3 years ago
7 0

Answer:

shouldn't it be 8? I think it might be. Sorry if I'm wrong...

Step-by-step explanation:

tester [92]3 years ago
6 0
28.................
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Jenny’s great grandmother is 90 years old Jenny is 12 years old. What percent of Jenny’s great grandmothers age is Jenny age
Bogdan [553]
To find Jenny's age as a percentage of her great grandmother's age :

\dfrac{12}{90} \times 100

= 13\dfrac{1}{3} \ \%
7 0
3 years ago
The line passing through the points (-7,4) and (-23,y) is parallel to a line that has a slope of -5/8. What is the value of y?
Burka [1]
Two lines that are parallel to each other, will have the same slope.

so if this line is parallel to another with a slope of -5/8, the slope of this line is also -5/8 then.  We also know that it passes through -7, 4 and -23, y, let's do some checking.

\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%   (a,b)
&({{ -7}}\quad ,&{{ 4}})\quad 
%   (c,d)
&({{ -23}}\quad ,&{{ y}})
\end{array}
\\\\\\
% slope  = m
slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ y_2}}-{{ y_1}}}{{{ x_2}}-{{ x_1}}}\implies \cfrac{y-4}{-23-(-7)}\implies \cfrac{y-4}{-23+7}
\\\\\\
\cfrac{y-4}{-16}=\boxed{-\cfrac{5}{8}}\implies 8y-32=80\implies 8y=112
\\\\\\
y=\cfrac{112}{8}\implies y=14
3 0
3 years ago
Write an expression that gives the requested sum.
Lyrx [107]
<h2>Answer:</h2><h2>The expression to give the requested sum after simplifying, S_{20} = {3(3^{20}-1) }</h2>

Step-by-step explanation:

To find the sum of first 20 terms,

a = 6, r = 3

By formula, S_{n} = \frac{a(r^{n}-1) }{r-1}

substitute the values in the above formula, the equation becomes,

S_{20} = \frac{6(3^{20}-1) }{3-1}

S_{20} = \frac{6(3^{20}-1) }{2}

S_{20} = {3(3^{20}-1) }

8 0
3 years ago
Find the exact value of sin A in simplest radical form.
pantera1 [17]

Answer:

sin A = 0.69

Step-by-step explanation:

sin A = 20 / 29 = 0.69

7 0
3 years ago
Read 2 more answers
Factorise x^2-12x+32
Volgvan

workings...

-8x-4=32

-8-4=12

answer: (x-8)(x-4)

7 0
3 years ago
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