All categories

3 years ago

Suppose you cannot remember the answer to 15-8=7. What could you do to solve?

2 answers:

3 0

You can think in reverse. Addition is the opposite of subtraction. So to solve 15-8, you can ask "8 plus what number is equal to 15?" and note how 8+7 = 15. So that's why 15-8 = 7. Similarly, 15-7 = 8 can be solved the same way.

Delvig [45]3 years ago

3 0

Calculate either in your head or on a paper what plus 8 equals 15, you can solve it easily this way. It is probably easier to do in your head (9, 10, 11, ...), continue on and make sure to remember how much is the sum.

You might be interested in

Which expression is equivalent to<br> (X^1/4 y^16)^1/2?

lawyer [7]

Answer:

$x^{\frac{1}{8} } y^{8}$

Step-by-step explanation:

Given :

$(x^\frac{1}{4} y^{16} )^{1/2}$

Now,

$(x^\frac{1}{4} y^{16} )^{1/2}\\x^{\frac{1}{8} } y^{8}$

Therefore, expression is equivalent to $x^{\frac{1}{8} } y^{8}$

3 0

3 years ago

The value of y varies directly with x if x=8 then y=96 what is the value of x when y=196

ExtremeBDS [4]

Answer:

Step-by-step explanation:

6 0

2 years ago

Solve the equation. Check your answers.<br>29=7x+5-4x

Vladimir [108]

Answer:

x = 8

Step-by-step explanation:

29=7x + 5 -4x

add like terms: 29 = 3x +5

get your x variable on one side

24 = 3x

divide by 3

x = 8

check!

29 = 7(8) + 5 -4(8)

29 = 56 + 5 -32

29 = 51 - 32

29 = 29

6 0

3 years ago

Sheri surveyed eighty students and then generated three random samples of twenty-five student responses. The means of the sample

Vesnalui [34]

Answer:

Where is the table cant help unless shown

Step-by-step explanation:

6 0

2 years ago

A farm had 480 acres more wheat than corn. After the farmers collected 80% of the wheat and 25% of the corn, the area of the whe

SVEN [57.7K]

A farm had 480 acres more wheat than corn. Let use "W" to represent the Wheat and let use "C" to represent the corn. Hence, we have below:
W=C+480

The farmers collected 80% of the wheat and 25% of the corn and the area of the wheat is 300 acres less than the area of the corn:
W-0.8W=C-0.25C+300
0.2W=0.75C+300
We have two equations, two unknowns:
0.2(C+480)=0.75C+300
0.2C+96=0.75C+300
0.55C=294
C=534.55

6 0

3 years ago

Read 2 more answers