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Serjik [45]
3 years ago
7

Solve each equation mentally.

Mathematics
2 answers:
motikmotik3 years ago
7 0
16. 4 (9*4=36) 
17. 6 (6*11=66)
18. 8 (10*8=80)
19. 9 (9*5=45)
20. 48 (4*12=48)
21. 13 (13*2=26)



andreyandreev [35.5K]3 years ago
4 0
16.4
17.6
18.8
19.9
20.48
21.13
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You triple your account balance by making a deposit. Then you withdraw $28.50 from your bank account. Now your account is overdr
Crazy boy [7]

Answer:

Your original account balance before you made the deposit is $6

Step-by-step explanation:

Let x = your original account balance.

You triple your account balance by making a deposit. This means

New account balance = 3 × x = 3x

Then you withdraw $28.50 from your bank account. This means that you have $(3x - 28.5) left.

Now your account is overdrawn by $10.50. This means you have withdrawn beyond what you have in your account. Your new account balance is -$10.5. Therefore,

3x - 28.5 = - 10.5

3x = -10.5 + 28.5 = 18

x = 18/3 = 6

Your original account balance before you made the deposit is $6

8 0
3 years ago
Please help ASAP. The picture is above
Setler [38]
Every triangle’s inner angles’ addition equals to 180°
So if we find the x:
38°+x+2°+x=180°
40°+2x=180°
2x=180°-40°=140°
x=140°/2
x=70°
Now if we find the I hope this helped :)
7 0
3 years ago
Read 2 more answers
Someone help me understand
likoan [24]

Answer:

f¯¹(x) = 23/ (6x + 3)

Step-by-step explanation:

f(x) = (23 – 3x)/6x

The inverse, f¯¹, for the above function can be obtained as follow:

f(x) = (23 – 3x)/6x

Let y be equal to f(x)

Therefore, f(x) = (23 – 3x)/6x will be written as:

y = (23 – 3x)/6x

Next, interchange x and y.

This is illustrated below:

y = (23 – 3x)/6x

x = (23 – 3y)/6y

Next, make y the subject of the above expression. This is illustrated below:

x = (23 – 3y)/6y

Cross multiply

6xy = 23 – 3y

Collect like terms

6xy + 3y = 23

Factorise

y(6x + 3) = 23

Divide both side by (6x + 3)

y = 23/ (6x + 3)

Finally, replace y with f¯¹(x)

y = 23/ (6x + 3)

f¯¹(x) = 23/ (6x + 3)

Therefore, the inverse, f¯¹, for the function f(x) = (23 – 3x)/6x is

f¯¹(x) = 23/ (6x + 3)

7 0
3 years ago
Geometry problems, will mark branliest
pav-90 [236]

Answer:

that looks hard

Step-by-step explanation:

6 0
3 years ago
a park is rectangular with a length of 2/3 miles in the area of the park is 3/9 square miles what is it what is the width ​
Helen [10]

Answer:

The width w of the rectangular park = 1/2

Step-by-step explanation:

Given

The length of the rectangular park l = 2/3 miles

The area of the park A = 3/9 square miles

To determine

The width of the rectangular park w = ?

Using the formula of the Area of the rectangle

A\:=\:wl

w\:=\:\frac{A}{l}

    =\frac{\frac{3}{9}}{\frac{2}{3}}

    =\frac{3\cdot \:3}{9\cdot \:2}          ∵ Fraction rule:  \frac{\frac{a}{b}}{\frac{c}{d}}=\frac{a\cdot \:d}{b\cdot \:c}

    =\frac{9}{18}

    =\frac{1}{2}

Therefore, the width w of the rectangular park = 1/2

6 0
3 years ago
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