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IRISSAK [1]
3 years ago
10

-4(10-a)/9=-4 what does a equal

Mathematics
1 answer:
yulyashka [42]3 years ago
8 0

a=1

Hope this helps

have a great day!

Step-by-step explanation:

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September 6 is a Read Book Day.Polina read 5 times as many pages as Marcus read.Together,the read 108 pages.How many pages did e
Gemiola [76]

Answer:

The number of pages that Polina read was 90 and the number of pages that Marcus read was 18

Step-by-step explanation:

Let

x -----> number of pages that Polina read

y ----> number of pages that Marcus read

we know that

x+y=108 ----> equation A

x=5y -----> equation B

substitute equation B in equation A and solve for y

5y+y=108\\6y=108\\y=18

Find the value of x

x=5y -----> x=5(18)=90

therefore

The number of pages that Polina read was 90 and the number of pages that Marcus read was 18

3 0
3 years ago
Use the given information to solve for x and y
Anuta_ua [19.1K]

Answer:

x = 10 and y = 7

Step-by-step explanation:

Equalateral triangle means all sides are equal.

x = 10,  easy

make y + 3 = 10

y = 7

Easy, no real math needed. lol

4 0
3 years ago
An object is 3.6 m from the pinhole. Its image is 4.2 cm from the opposite side of the pinhole. The height of the image is 0.8 c
madreJ [45]

Answer:

Height of the object is 68.6 cm.

Step-by-step explanation:

The height of the object can be determined by:

\frac{object distance from pinhole}{image distance from pinhole} = \frac{object height}{image height}

From the given question;

object distance from pinhole = 3.6 m = 360 cm

image distance from pinhole = 4.2 cm

height of image = 0.8 cm

So that;

\frac{360}{4.2} = \frac{object height}{0.8}

⇒ object height = \frac{360*0.8}{4.2}

                           = \frac{288}{4.2}

                           = 68.571

object height = 68.6 cm

Thus, the height of the object is 68.6 cm.

5 0
3 years ago
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Answer:

erm

Step-by-step explanation:

25

4 0
3 years ago
Evaluate 7C6. (1 point)<br><br> A. 9<br> B. 1<br> C. 5,040<br> D. 7
notsponge [240]
\bf _nC_r=\cfrac{n!}{r!(n-r)!}\qquad &#10;\begin{cases}&#10;n=\textit{total elements}\\&#10;r=\textit{partials}\\&#10;--------\\&#10;n=7\\&#10;r=6&#10;\end{cases}\implies _7C_6=\cfrac{7!}{6!(7-6)!}
5 0
3 years ago
Read 2 more answers
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