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2 years ago

Select the correct answer

Mathematics

1 answer:

Amiraneli [1.4K]2 years ago

8 0

Answer:

c or d

Step-by-step explanation:

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Right answer gets brainlist

vampirchik [111]

Answer:

1012.65

Step-by-step explanation:

6.28 (7.5) ×14 + 6.28(56.25)

659.4 + 353.25

1012.65

4 0

2 years ago

Decompose fraction 2 3/4

ludmilkaskok [199]

Answer:

11 * 1/4

Step-by-step explanation:

Hi!

Since to decompose a fraction means to basically take it apart, that's all we have to do!

Breaking down the fraction, we can see that it is composed of a bunch of 1/4.

(As an improper fraction below.)

$\frac{11}{4}$ .

That's just $11 \cdot \frac{1}{4}$ .

Thus, the answer is $\boxed{11\:\cdot\:\frac{1}{4}}$ .

Hope this helps!

5 0

2 years ago

1)5/8 equals 10/?

erastovalidia [21]

1) 16
2) 2
3) 6
4) 70
5) 9
6) 15
7) 20

7 0

3 years ago

Evaluate S5 for 300 + 150 + 75 + … and select the correct answer below. 18.75 93.75 581.25 145.3125

Savatey [412]

we have that

$300 + 150 + 75 +...$

Let

$a1=300\\ a2=150\\ a3=75$

we know that

$\frac{a2}{a1} =\frac{150}{300} \\\\ \frac{a2}{a1}=0.5 \\ \\ a2=a1*0.50$

$\frac{a3}{a2} =\frac{75}{150} \\\\ \frac{a3}{a2}=0.5 \\ \\ a3=a2*0.50$

$a(n+1)=an*0.50$

Is a geometric sequence

Find the value of $a4$

$a(4)=a3*0.50$

$a(4)=75*0.50$

$a(4)=37.5$

Find the value of $a5$

$a(5)=a4*0.50$

$a(5)=37.5*0.50$

$a(5)=18.75$

Find $S5$

$S5=a1+a2+a3+a4+a5\\ S5=300+150+75+37.5+18.75\\ S5=581.25$

therefore

the answer is

$581.25$

Alternative Method

Applying the formula

$S_n=\frac{a_1 (1-r^n)}{1-r} \\\\a_1=300 \\ r=\frac{1}{2}\\\\ S_5=\frac{300(1-(\frac{1}{2})^5)}{1-\frac{1}{2}}\\\\=\frac{300(1-\frac{1}{32})}{\frac{1}{2}}\\\\=\frac{300 \times \frac{31}{32}}{\frac{1}{2}}\\\\=\frac{75 \times \frac{31}{8}}{\frac{1}{2}}\\\\=\frac{\frac{2325}{8}}{\frac{1}{2}}\\\\=\frac{2325}{8} \times 2\\\\=\frac{2325}{4}\\\\=581 \frac{1}{4}\\\\=581.25$

therefore

the answer is

$581.25$

6 0

2 years ago

Read 2 more answers

Solution the the system of equations 2x+4y=-8 and -2x+3y=29

Zina [86]

The answer to this is y=3 and x=-10.

5 0

3 years ago