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2 years ago

Here a subtraction problem that has been solved incorrectly 21-9=11 what answer I got b 11+9=20

Mathematics

1 answer:

Archy [21]2 years ago

4 0

The Answer:

21 - 9 = 12, not 11.

explanation:

It is not much else to say here, so straightforward, the answer lies above.

Therefore,

you are correct. 11 + 9 = 20 - 9 = 11, which is correct for the given equation.

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Between which two numbers is Negative two-thirds located on a number line?

klemol [59]

Answer:-1 and 0

Step-by-step explanation:

5 0

3 years ago

The wildflowers at a national park have been decreasing in numbers. There were 1200 wildflowers in the first year that the park

bonufazy [111]

Year New flowers

1 1200

2 300

3 75

There were 1200 wildflowers in the first year that the park started tracking them. Since then, there have been one fourth as many new flowers each year

Initially there are 1200 flowers and start decreasing by $\frac{1}{4}$

So first term is 1200 and common ratio is $\frac{1}{4}$ .

Its a geometric sequence so summation becomes

i =1∑ ∞ 1200( $\frac{1}{4})^{i-1}$

Now we find the sum

We use sum formula

$Sum = \frac{a}{1-r}$

Where a is the first term , a= 1200

r is the common ratio , r= 1/4

$Sum = \frac{1200}{1-(\frac{1}{4})}$

$Sum = \frac{1200}{\frac{3}{4}}$

Sum = 1600 wildflowers

4 0

3 years ago

The square root of 129 is between what two integers

BigorU [14]

Hey there! :)

Your answer is: Between 11 and 12

11² = 11 × 11 = 121
12² = 12 × 12 = 144

129 is between 121 and 144

Hope this helps :)

6 0

2 years ago

1. Kane earns an annual salary of $42,500.

Katarina [22]

Answer:

$1753.13

Step-by-step explanation:

Kane's Annual Salary = $42,500

Gross Pay = $42,500

Net Pay = Gross Pay - 1% of Gross Pay

=42500 - (0.01 X 42500)

=$42,075

Since he is paid twice a month with paychecks being of equal amounts.

Number of Payments in a Year =12 X 2= 24

Therefore, Kane's Take Home pay after Medicare taxes

$= \$42075 \div 24\\=\$1753.13$ (to the nearest cent)$

5 0

2 years ago

A box contains blue, red, and green pens. 25% of the pens are green and 35% are red. 48 blue pens cannot be used, but the remain

Mama L [17]

Answer: number of blue pen = 128

Number of pen in the box = 320

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Here a subtraction problem that has been solved incorrectly 21-9=11 what answer I got b 11+9=20​

Here a subtraction problem that has been solved incorrectly 21-9=11 what answer I got b 11+9=20