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MariettaO [177]
3 years ago
9

Kylie and her children went into a bakery and she bought $10 worth of donuts and brownies. Each donut costs $1.25 and each brown

ie costs $2.50. She bought twice as many donuts as brownies. Determine the number of donuts and the number of brownies that Kylie bought.
Mathematics
2 answers:
Nataly [62]3 years ago
8 0

Answer:

she bought 4 donuts and 2 brownies.

Step-by-step explanation:

This is a question on simultaneous equations where two variable are given with two or more relational equations. if she bought $10 worth of donuts and brownies, and each donut costs $1.25 and each brownie costs $2.50.

Then,

1.25d + 2.50b = 10 where d and b are the numbers of donuts and brownies purchased respectively.

if She bought twice as many donuts as brownies, then

d = 2b

Therefore,

1.25(2b) + 2.50b = 10

5b = 10

b = 2

d = 2 × 2 = 4

Hence she bought 4 donuts and 2 brownies.

daser333 [38]3 years ago
7 0

Answer:

4 donuts and 2 brownies

Step-by-step explanation:

Guess and check

2 donuts --> $2.50

1 brownie -->$2.50

Since the amount of donuts is double,

we try :

4 donuts -->$1.25(4) = $5

2 brownies --> $2.50(2) = $5

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Nookie1986 [14]

Answer:

<em>The angle of elevation of the sun is 32°</em>

Step-by-step explanation:

<u>Right Triangles</u>

The flagpole and the ground form a right angle (90°). In triangles with right angles, the trigonometric ratios are satisfied.

Each acute angle has an adjacent leg and an opposite leg. The tangent ratio relates to both legs.

\displaystyle \tan x=\frac{\text{opposite leg}}{\text{adjacent leg}}

The opposite leg to angle x is 20 ft and the adjacent leg is 32 ft, thus:

\displaystyle \tan x=\frac{20}{32}=0.625

Calculate x by using the inverse tangent:

x=\arctan 0.625

x=32^\circ

The angle of elevation of the sun is 32°

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3 years ago
During a fundraiser, students in Math Club make a $0.50 profit for every candy bar they sell. Let n represent the number of cand
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Answer:

$5

Step-by-step explanation:

If every candy bar is $0.50 and they sell 10 just do

0.50 x 10 = 5

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3 years ago
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fredd [130]

Answer:

75.9375%

Step-by-step explanation:

We apply the simple interest formula;

we first determine the amount of accrued interest to be earned;

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Applying the simple interest formula;

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Answer:

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Step-by-step explanation:

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Hence he walk 6 miles and he get a taxi for 31-6=25 miles.

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