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ICE Princess25 [194]
2 years ago
6

Grade 8 Math

Mathematics
1 answer:
seraphim [82]2 years ago
8 0
Add 31 to both sides.

Since you brought the 9n over to the left side you have to get rid of other numbers that aren't n on that side

So you add the 31 to both side to remove it from the left
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Jasmine bought a calendar and a book for a total of $24. The calendar cost $10. Which equation can be used to find b, the cost o
Verdich [7]

24-10=b

The cost of b is 14

Hope this helps

6 0
3 years ago
Read 2 more answers
For the expression 34- 34a to have a negative​ value, what must be true about the value of a ​?
MArishka [77]

Answer:

a>0

Step-by-step explanation:

if a is negative then the subtraction sign would switch. therefore, for the expression to have a negartive value a must be greater than 0

5 0
3 years ago
Find S5 for a geometric series for which a1=81 and r=1/9.
Minchanka [31]

ANSWER

S_5=91\frac{10}{81}




EXPLANATION


The sum of the first n terms of a geometric sequence is given by;


S_n=\frac{a_1(1-r^n)}{1-r} ,-1


Where n, is the number of terms and a_1 is the first term.


When n=5, we have a_1=81, we get;


S_5=\frac{81(1-(\frac{1}{9})^5)}{1-\frac{1}{9}}


S_5=\frac{81(1-\frac{1}{59049})}{1-\frac{1}{9}}


S_5=\frac{81(\frac{59048}{59049})}{\frac{8}{9}}




S_5=\frac{7381}{81}


S_5=91\frac{10}{81}




6 0
3 years ago
Look at the image please helppp
balu736 [363]

Answer:

Option A. one rectangle and two triangles

Option E. one triangle and one trapezoid

Step-by-step explanation:

step 1

we know that

The area of the polygon can be decomposed into one rectangle and two triangles

see the attached figure N 1

therefore

Te area of the composite figure is equal to the area of one rectangle plus the area of two triangles

so

A=(8)(4)+2[\frac{1}{2}((8)(4)]=32+32=64\ yd^2

step 2

we know that

The area of the polygon can be decomposed into one triangle and one trapezoid

see the attached figure N 2

therefore

Te area of the composite figure is equal to the area of one triangle plus the area of one trapezoid

so

A=\frac{1}{2}(8)(4)+\frac{1}{2}((4+8)(8)=16+48=64\ yd^2

7 0
3 years ago
Another math two step equation, please help thank you.
ValentinkaMS [17]

1.25*(t)+7=43.25


To solve the  2nd one, you must do 43.25 - 7 = 26.25

36.25 divided by 1.25 = 29

4 0
3 years ago
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