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3 years ago

Use mental math to simplify (3 + 62) +7.

Mathematics

2 answers:

Delicious77 [7]3 years ago

6 0

72 3 plus 62 is 65 plus 7 is 72

swat323 years ago

6 0

Answer:

(3+62)+7

65+7

Step-by-step explanation:

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PLEASEEEE HELP!!!!!!!!!!<br><br> DEF and GHI are shown below.<br> Which statement is true?

Softa [21]

Answer:

They are not similar,

the reason why is because 56 degrees is given and the two sides that form the angle are the same length whilst the other triangle has two uneven sides that form a 56 degree angle.

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2 years ago

5. When y varies directly with x, the value of y = -2 when x = 4. What is the value of y when x = 8?

zmey [24]

Answer:

-4

Step-by-step explanation:

if y = -2 then x = 4

what is y when x = 8

$\frac{ - 2}{x} = \frac{4}{8} \\ - 16 = 4x \\ x = - 4$

7 0

3 years ago

A door 2m*1m is fixed on a wall.The wall is 8.5 long and 2m high.Find the cost of whitewashing the wall ₹40 per square meter.

Savatey [412]

Answer:

$600\ rupees$

Step-by-step explanation:

$We\ are\ given:\\Dimensions\ of\ the\ door=2m *1m\\Dimensions\ of\ the\ wall=8.5m*2m\\Cost\ of\ whitewashing\ of\ 1m^2=40\ rupees\\Hence,\\First\ lets\ consider\ the\ wall:\\Area\ of\ a\ rectangle= Length*Width\\Here,\\Length\ of\ the\ wall=8.5\ m\\Width\ of\ the\ wall=2\ m[As\ here\ width\ and\ height\ are\ the\ same\ thing]\\Hence,\\Area\ of\ the\ wall=8.5*2=17\ m^2$

$Now,\\Lets\ consider\ the\ door:\\As\ we\ know\ that,\\Area\ of\ a\ rectangle=Length*Width\\Here,\\Length\ of\ the\ door=2m\\Width\ of\ the\ door=1\ m\\Hence,\\Area\ of\ the\ door=2*1=2m^2\\\\Now,\\The\ area\ to\ be\ whitewashed=Area\ of\ the\ wall-Area\of\ the\ door\\Hence,\\The\ area\ to\ be\ whitewashed=17-2=15\ m^2\\\\As\ we\ know\ that,\\Cost\ of\ whitewashing\ 1\ m^2\ of\ the\ wall= 40\ rupees\\Hence,\\$

$Cost\ of\ whitewashing\ the\ whole\ wall=Area\ of\ the\ wall\ to\ be\\ whitewashed*Rate\ of\ whitewashing\ per\ m^2\\Hence,\\Cost\ of\ whitewashing\ the\ whole\ wall=15*40=600\ rupees$

8 0

3 years ago

Mrs. Piazza invested $8000 in a certificate of deposit that pays 3% simple interest for 4 years. How much will be in Mrs. Piazza

fomenos

Answer:

$8960

Step-by-step explanation:

Given

principal = $8000

rate= 3%= 0.03

time = 4 years

Required

the final amount, we assume that this is a simple interest investment.

Step two:

$A= P(1+rt)\\\\A=8000(1+0.03*4)\\\\A=8000(1+0.12)\\\\A=8000*(1.12)\\\\A=8960$

The final amount in the account is $8960

3 0

3 years ago

Norma had 3/8 birthday cake left over from her party . She ate 3/4 of the leftover cake at lunch. How much of the whole cake did

AlladinOne [14]

Answer:

1/ 2

Step-by-step explanation:

Given that :

Fraction left over = 3/8

Fraction of leftover ate = 3/4

Amount of the whole cake Norma have at lunch :

Fraction left over ÷ fraction of left over ate

3/8 ÷ 3/4

3/8 * 4/3

(3*4) / (8*3)

12 / 24

1/2

1/2 of the whole cake

7 0

3 years ago

Read 2 more answers