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4 years ago

HELP! I DONT GET IT!!

2 answers:

8 0

2r + b = 8.40 3r + b = 9.35 You order 2 refills and 1 egg breakfast, costing a total of $8.40. So your equation becomes: 2r + b = 8.40 Your friend ordered 3 refills and 1 egg breakfast, costing 9.35. So his equation is 3r + b = 9.35

Stels [109]4 years ago

6 0

Me: 2r+b=8.40⇒b=8.40-2r
friend: 3r+b=9.35
b=8.40-2r
3r+8.40-2r=9.35

b=8.40-2r
r=9.35-8.40⇒r=0.95

b=8.40-2*0.95⇒b=$6.50
r=$0.95

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harina [27]

Answer :

4167 bricks.

Explanation :

Since the wall with all its bricks makes up the space occupied by it, we need to find the volume of the wall, which is nothing but a cuboid.

Here,

${\qquad \dashrightarrow{ \sf{Length=10 \: m=1000 \: cm}}}$

$\qquad \dashrightarrow{ \sf{Thickness=24 \: cm}}$

$\qquad \dashrightarrow{ \sf{Height=4 m=400 \: cm}}$

Therefore,

${\qquad \dashrightarrow{ \bf{Volume \: of \: the \: wall = length \times breadth \times height}}}$

${\qquad \dashrightarrow{ \sf{Volume \: of \: the \: wall = 1000 \times 24 \times 400 \: {cm}^{3} }}}$

Now, each brick is a cuboid with Length = 24 cm, Breadth = 12 cm and height = 8 cm.

So,

${\qquad \dashrightarrow{ \bf{Volume \: of \: each \: brick = length \times breadth \times height}}}$

${\qquad \dashrightarrow{ \sf{Volume \: of \: each \: brick = 24 \times 12 \times 8 \: {cm}^{3} }}}$

So,

${\qquad \dashrightarrow{ \bf{Volume \: of \: bricks \: required = \dfrac{volume \: of \: the \: wall}{volume \: of \: each \: brick} }}}$

${\qquad \dashrightarrow{ \sf{Volume \: of \: bricks \: required = \dfrac{1000 \times 24 \times 400}{24 \times 13 \times 8} }}}$

${\qquad \dashrightarrow{ \sf{Volume \: of \: bricks \: required = \bf \: 4166.6} }}$

Therefore,

The wall requires 4167 bricks.

6 0

2 years ago

WILL GIVE EXTRA BRAINLST HAVE A NICE DAy

leonid [27]

Answer:

I, I

Step-by-step explanation:

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3 0

3 years ago

Would 1, 2, 5, form a right angle

BabaBlast [244]

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5 0

3 years ago

Please help!! It’s for homework.

motikmotik

Answer:

t = cost of a ticket

4t+55

Step-by-step explanation:

Cost 1

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Let t = cost of a ticket

4*t

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8 0

3 years ago

Read 2 more answers

Jack is investing $3,000 into an account

marin [14]

Answer:

Step-by-step explanation:

I think this is the equation for annual compunt interest

FV = PV(1 + int)^time PV is present value FV is the future value

PV + Interest = FV

FV - PV = Interest

FV - PV

Interest = [3000(1 + 0.03)^30] - 3000

= 3000(1.03)^30 - 3000

= 3000(2.4272) - 3000

= 7281.79 - 3000

= $4282 to the nearest dollar <------------ Fianl Answer

5 0

3 years ago