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Tatiana [17]
3 years ago
9

Three times a number, subtracted from 20, is equal to -7

Mathematics
1 answer:
tia_tia [17]3 years ago
4 0
The answer is 20-3x=-7 explanation
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Order the following expressions by their values from least to greatest
svlad2 [7]
N-Q, N, Q-N

Explanation: N=-2/Q=1
Equations:
-2-1=-3(N-Q)
-2(N)
1- -2=3(Q-N)
4 0
3 years ago
Write a recrusive rule for the exponential function<br>f(x)=0.25(2/3)^x​
krok68 [10]

Answer:

f(0) = 0.25 = 1/4

f(x) = f(x-1) × 2/3

Step-by-step explanation:

a0 = 0.25×(2/3)⁰ = 0.25×1 = 0.25 = 1/4

a1 = 0.25×(2/3)¹ = 0.25×(2/3) = 1/4 × 2/3 = 2/12 = 1/6 =

= a0 × 2/3

a2 = 0.25×(2/3)² = 0.25×(4/9) = 1/4 × 4/9 = 4/36 = 1/9 =

= a1 × 2/3

=>

an = an-1 × 2/3, n >= 1

but what about negative x ?

is a0 = a-1 × 2/3 ?

a - 1 = 0.25 \times  {(2 \div 3)}^{ - 1}

so, yes, a0 = a-1 × (2/3)

and a-1 = a-2 × (2/3)

...

4 0
2 years ago
Your cousin gave you 27 dollars with which to buy a present. this covered 9/10 of the cost. how much did the present cost
yaroslaw [1]
27/10 is 2.7
2.7*9 gets you $24.3

:)

3 0
3 years ago
Read 2 more answers
Calculate the length of the side of the square to 1dp.​
Sveta_85 [38]

Answer:

72 cm

Step-by-step explanation:

You can solve this problem using the properties of the 45-45-90 right triangle. Assuming the 12 cm is a diagonal of the square, each side of the square can be modeled as x, and the diagonal will be x\sqrt{2}.

This means x\sqrt{2} =12, so  x=\frac{12}{\sqrt{2} }.

Next, to find the area of the square you take the square of any of its sides. Since x is the length of one side, and x=\frac{12}{\sqrt{2} } , you can square \frac{12}{\sqrt{2} } to get the area. This is equal to \frac{144}{2} or 72 cm.

8 0
2 years ago
8(c − 12) = −40<br><br> (:3」∠)_ Dem legz
TEA [102]
8(c-12)=40 that gonna be equal to 8c-96=-40 or 8c=-40+96 ,8c =56 divide both sides by 8 that equal to 7.....
5 0
3 years ago
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