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3 years ago

Omar thinks of a two digit number it is a factor of 78 it is a prime number what is his number

Mathematics

2 answers:

AleksandrR [38]3 years ago

7 0

Factors of 78 are:

1,2,3,6,13,26,39,78.

13 is the prime two-digit number.

Vlad [161]3 years ago

7 0

Answer:

$13$

Step-by-step explanation:

First write the factors of 78

$1 \: \: 3 \: \: 6 \: \: 13 \: \: 26 \: \: 39 \: \: 78$

Now write the prime number that you can see above

$3 \: \: \: 13$

Now write the two digit number ( prime number) that you can see above

$13$

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Someone pls help, its on trig ratios.

Mars2501 [29]

Answer:

$BC=12.8,\\AC=15.1$

Step-by-step explanation:

In right triangles only, the tangent of an angle is equal to its opposite side divided by its adjacent side.

Therefore, we have the following equation:

$\tan 58^{\circ}=\frac{BC}{8}$

Solving, we get:

$BC=8\tan 58^{\circ}\approx \boxed{12.8}$

Also in right triangles only, the cosine of an angle is equal to its adjacent side divided by the hypotenuse of the triangle.

$\cos 58^{\circ}=\frac{8}{AC},\\AC=\frac{8}{\cos 58^{\circ}},\\AC\approx \boxed{15.1}$

We can also use the Pythagorean theorem now that we've found BC. However, if you choose to do so, make sure you don't use a rounded value for BC, as that could cause a notable deviation in your final answer.

Using the Pythagorean theorem to verify our answers:

$8^2+(8\tan 58^{\circ})^2=\left(\frac{8}{\cos 58^{\circ}}\right)^2\:\checkmark$

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3 years ago

13. The lengths of two adjacent sides of a parallelogram are 7 cm and 5 cm respectively.

SashulF [63]

Answer:

perimeter of the required parallelogram = 24 cm

Step-by-step explanation:

perimeter of parallelogram = 2( l + b ) = 2 ( 7 + 5 )

= 2 × (12)

= 24 cm

i hope it helped

7 0

3 years ago

Steve bought 2 plain pizzas and 1/4 of a pepperoni pizza.in all how much pizza did he buy

blondinia [14]

1= 4/4 therefore 2=8/4
8/4 + 1/4 = 9/4
So Steve bought 9/4 of pizza total

3 0

3 years ago

Read 2 more answers

Someone able to solve this ? Please

alexandr1967 [171]

Type it into Desmos graphing calculator it is so helpful.

Have a merry Christmas!

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3 years ago

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lara31 [8.8K]

Answer:

C and B

Step-by-step explanation:

(6)

$\frac{3x-7y}{8}$ × $\frac{6}{3x-7y}$ ← cancel 3x - 7y on numerator and denominator

= $\frac{1}{8}$ × $\frac{6}{1}$ = $\frac{6}{8}$ = $\frac{3}{4}$ → C

(7)

$\frac{6x}{x^2-9}$ ÷ $\frac{8}{4x-12}$

Factorise the denominators of both fractions

x² - 9 = x² - 3² = (x - 3)(x + 3) ← difference of squares

4x - 12 ← factor out 4 from each term

= 4(x - 3)

Then rewrite as

$\frac{6x}{(x-3)(x+3)}$ ÷ $\frac{8}{4(x-3)}$ ← cancel 8 and 4 by 4

= $\frac{6x}{(x-3)(x+3)}$ ÷ $\frac{2}{x-3}$

• leave first fraction, change ÷ to × , turn second fraction ' upside down'

= $\frac{6x}{(x-3)(x+3)}$ × $\frac{x-3}{2}$ ← cancel x - 3 on numerator and denominator

= $\frac{6x}{x+3}$ × $\frac{1}{2}$ ← cancel 2 and 6 on numerator and denominator

= $\frac{3x}{x+3}$ → B

8 0

3 years ago