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3 years ago

How do you write twice the sum of seven and a number

Mathematics

2 answers:

scZoUnD [109]3 years ago

5 0

Answer:

2 (7 + n)

Step-by-step explanation:

2 (7 + n)

For this equation you need to put parenthesis to show that you need to add, then multiply.

Hope this helps! :)

krek1111 [17]3 years ago

3 0

I believe to do this, you would write the eqaution 2(7+x).

The question says twice the sum (addition) of 7 and a number. The x takes the place of a number. Putting it all together we get 2(7+x).

Hope this helps! If you appreciated my answer, please brainliest me!

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Please help, I need input on if I did this correctly and you just substitute.

kow [346]

The value of h(t) when $t=\frac{15}{32}$ is 10.02.

Solution:

Given function $h(t)=-16t^2+15t+6.5$

To find the value of h(t) when $t=\frac{15}{32}$ :

$h(t)=-16t^2+15t+6.5$

Substitute $t=\frac{15}{32}$ in the given function.

$$h\left(\frac{15}{32} \right)=-16\left(\frac{15}{32} \right)^2+15\left(\frac{15}{32} \right)+6.5$

$$=-16\left(\frac{225}{1024} \right)+15\left(\frac{15}{32} \right)+6.5$

Now multiply the common terms into inside the bracket.

$$=-\left(\frac{3600}{1024} \right)+\left(\frac{225}{32} \right)+6.5$

Now, in the first term, the numerator and denominator both have common factor 16. So reduce the first term into the lowest term.

$$=-\left(\frac{225}{64} \right)+\left(\frac{225}{32} \right)+6.5$

To make the denominator same, take LCM of the denominators.

LCM of 64 and 32 = 64

$$=-\left(\frac{225}{64} \right)+\left(\frac{225\times2}{32\times2} \right)+6.5\times\frac{64}{64}$

$$=-\frac{225}{64} +\frac{450}{64}+\frac{416}{64}$

$$=\frac{-225+450+416}{64}$

$$=\frac{641}{64}$

= 10.02

$$h\left(\frac{15}{32} \right)=10.02$

Hence the value of h(t) when $t=\frac{15}{32}$ is 10.02.

8 0

3 years ago

Which statement is true about the polynomial 3x?y2 - 5xy2 - 3x²y2 + 2x2 after it has been fully simplified?

Sladkaya [172]

4 terms, degree of 2

The terms is the amount of “numbers” you have, which is 4
The degree is the highest power, which is x^2

6 0

3 years ago

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Im having trouble with these and ive been staring at my screen for over an hour- I just need to know the answer-

irinina [24]

Answer:

(-3, 4)

It doesn't show any coordinates so I assume that the origin is where the x and y axes intercept

4 0

3 years ago

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X + 3 < 15<br> what is 4

professor190 [17]

Answer:

X = > 12 because 15 - 3 = 12 and if X was more than 12 it would be wrong.

Step-by-step explanation:

6 0

2 years ago

Look at the figure find the value of x for which l || m

Orlov [11]

Answer:

x=5

Step-by-step explanation:

19x and its vertical angle are equal. Lets call that angle y

<y and 17x are same side interior angles. Same side interior angles add to 180 if the lines are parallel. Since l is parallel to m.

<y + 17x=180

We know that y and 19x are equal since they are vertical angles, so we can substitute this in.

19x+ 17x = 180

Combine like terms.

36x = 180

Divide each side by 36

36x/36 = 180/36

x = 5

8 0

3 years ago