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3 years ago

john is 35 years old,and his son is 5. how many years will john be exactly 3 times as old as his son?

Mathematics

2 answers:

motikmotik3 years ago

6 0

(35+t)/(5+t)=3 --> 35+t = 15+3t --> 20=2t --> t=10 years

Dad: 45, son: 15 (works!)

jeka57 [31]3 years ago

6 0

10 years the son would be 15

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12 is what percent of 30?

EleoNora [17]

1. 12 is what percent of 30:
Ok let’s try to analyze the problem.
First, this problem is asking us to determine what the percentage of 12 out of 30 is.
=> 30 is equals to 100% of the number
=> 12 is the X% of the number.
Solutions:
=> 12 / 30 = 0.4
now, multiply this with 100% to get the percentage rate of this decimal number.
=> .4 * 100% = 40%
Therefore, 1 is 40% of the number 30.

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3 years ago

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How to find x in a parallelogram?

liubo4ka [24]

Answer:

Step-by-step explanation:

the shape is a parallelogram => angle E = angle G & angle F= angle D;

=> 11x-2=132

11x=134

x=12,(18)degree

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3 years ago

Write the equation, in slope-intercept form, of the line that has a slope of 2 and passes through the point (1,3 ).

Serga [27]

Slope intercept form is $y = mx+b$

where $m$ is the slope
and $b$ is the y-intercept

they give us that the slope is 2
so our $m = 2$

then to find $b$ , we temporarily plug in the point they gave us for x and y

so $3 = 2(1) + b$
and solve for $b$
3 = 2 + b
1 = b
so our $b = 1$

put this together and we get
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4 years ago

A recipe for chocolate chip muffin states that yields 12 muffins with 340 cal per muffin you and decided make a mini muffins and

stira [4]

If you eat two of your muffins, you will consume 408 calories.

<h3>How many calories are in a muffin?</h3>

Here a recipe says that yields 12 muffins with 340 calories per muffin, so the total number of calories for the recipe is:

C = 12*340 cal = 4,080 cal.

If you followed the same recipe, then the total number of calories of your 20 muffins is 4,080 calories.

Assuming that those calories are evenly distributed among the 20 muffins, then the number of calories each muffin will have is given by the quotient:

4,080cal/20 = 204 cal.

Each of your 20 muffins will have 204 calories, then if you eat two of these, you will consume 408 calories.

If you want to learn more about quotients:

brainly.com/question/629998

#SPJ1

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2 years ago

what is (5.91 x 10^-3) - (8.7 x 10^10) written in a scientific notation? Please answer asap thank you :))

nata0808 [166]

Answer:

Please check the explanation.

Step-by-step explanation:

Given the expression

$\left(5.91\times \:10^{-3}\right)-\left(8.7\times \:10^{10}\right)$

$\mathrm{Remove\:parentheses}:\quad \left(a\right)=a$

$=5.91\times \:10^{-3}-8.7\times \:10^{10}$

$5.91\times \:10^{-3}$

$\mathrm{Apply\:exponent\:rule}:\quad \:a^{-b}=\frac{1}{a^b}$

$=5.91\times \frac{1}{10^3}$

$=\frac{5.91}{1000}$

$=0.00591$

similarly

$8.7\times \:10^{10}$

Convert element to a decimal form

$10^{10}=10000000000$

$=10000000000\times \:8.7$

$\mathrm{Multiply\:the\:numbers:}\:8.7\times \:10000000000=87000000000$

$=87000000000$

Thus, the expression becomes

$\left(5.91\times \:\:10^{-3}\right)-\left(8.7\times \:\:10^{10}\right)=5.91\times \:\:10^{-3}-8.7\times \:\:10^{10}$

$=0.00591-87000000000$

$=-86999999999.9941$

Hence,

converting -86999999999.9941 in a scientific notation

In order to make our job easier we will remove the sign "-" from number -86999999999.9941 (we will write "-" at the final solution). So after this step we have:

−86999999999.9941 ⟶ 86999999999.9941

In order to write number 86999999999.9941 in scientific notation, we need to move the decimal point from its current location (black dot) to the new position such as:

8.6999999999.9941

So, we need to move the decimal point 10 places to the right.

This means that the power of 10 will be positive 10.

Now we have that the

Number part = 8.69999999999941 and

Exponent part = 10

Thus, we conclude that:

−86999999999.9941 = − 8.69999999999941 × 10¹⁰

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3 years ago