Dana recorded a temperature drop of 20 and a second temperature drop of 30. What is the total change in temperature
Answer: -50
Step-by-step explanation:
-20 + -30 = -50
The total change in temperature that Dana recorded will be -50 or a drop of 50.
What is a number system?The number system is a way to represent or express numbers.
A decimal number is a very common number that we use frequently.
Since the decimal number system employs ten digits from 0 to 9, it has a base of 10.
As per the given,
First temperature drop = -20
Second temperature drop = -20
Total drop = -20 - 20 = -40
Hence "The total change in temperature that Dana recorded will be -50 or a drop of 50".
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A rectangle is 10 cm long and it's perimeter is 26cm . find the breath of the rectangle
Answer:
the width of a rectangular is 3 cm
Step-by-step explanation:
Length L = 10 cm
Perimeter P = 26 cm
Width W = ?
perimeter = 2L + 2W
26 = 2(10) + 2W
26 - 20 = 2W
6 = 2W
W = 6 / 2
W = 3 cm
therefore, the width of a rectangular is 3 cm
If -4/3y=-3/4, then y =?
Step-by-step explanation:
y=-3/4 ÷ -4/3
y=+9/16
Answer:
So we have this equation:
[tex]\frac{-4}{3y}=\frac{-3}{4}[/tex]
We can multiply both sides by 4 and 3y:
[tex]\frac{-4*4*3y}{3y}=\frac{-3*4*3y}{4}[/tex]
[tex]-4*4=-3*3y[/tex]
[tex]-16 = -9y[/tex]
Now we divide both sides by 9:
[tex]\frac{-16}{-9}=y[/tex]
And we can remove the minus signs:
[tex]\frac{16}{9}=y[/tex]
If you mean [tex]\frac{-4}{3}y=\frac{-3}{4}[/tex]:
[tex]-4y*4=-3*3[/tex]
[tex]-16y = -9[/tex]
[tex]y=\frac{9}{16}[/tex]
5. Let f(x) = x - 2 and g(x) = x^2. Find the value of (g of)(4).
A.14
B.4
C. 62
D.32
Answer:
B. 4
Step-by-step explanation:
(g o f)(x) means that we put the expression for f(x) in for x in g(x):
(g o f)(x) = g(f(x)) = (x - 2)²
We want to find (g o f)(4), so plug 4 in for x:
(g o f)(x) = (4 - 2)² = 2² = 4
The answer is thus B.
~ an aesthetics lover
a certain oak tree is 12 feet taller than a certain pine tree. if the pine tree is p feet tall, which expression represents the height of the oak tree?
Answer:
o=p+12
Step-by-step explanation:
height of the oak tree is equal to the height of the pine tree plus 12 feet.
how to do this question plz answer me step by step plzz
Answer:
No
Step-by-step explanation:
First, figure out the circumference:
c=[tex]\pi[/tex]d
c=[tex]\pi[/tex]180=565.48
Then divide by the space needed:
565.48÷70=8.07
With 18 tables and 8 people per table:
18x8=144
So they only have seating for 144 guests.
Solve Quadratic Equations by Factoring:
Solve by factoring and using the Zero Product Property:
1. 2x^2+3x-5=x^2+4x-5
2. 16x^2+5=4
3. X^2+45=20-10x
WILL MARK BRAINLIEST!!
Answer:
x = 0 or 1x = ±i/4x = -5 (twice)Step-by-step explanation:
Factoring is aided by having the equations in standard form. The first step in each case is to put the equations in that form. The zero product property tells you that a product is zero when a factor is zero. The solutions are the values of x that make the factors zero.
1. x^2 -x = 0
x(x -1) = 0 . . . . . x = 0 or 1
__
2. 16x^2 +1 = 0
This is the "difference of squares" ...
(4x)^2 - (i)^2 = 0
(4x -i)(4x +i) = 0 . . . . . x = -i/4 or i/4 (zeros are complex)
__
3. x^2 +10x +25 = 0
(x +5)(x +5) = 0 . . . . . x = -5 with multiplicity 2
6. Let f(x)=x-2 and g(x) = x^2. Find the value of (fog)(-1).
A. -1
B.9
C.3
D.-3
Answer:
The answer is option AStep-by-step explanation:
f(x) = x - 2
g(x) = x²
In order to find (fog)(-1) we must first find (fog)(x)
To find (fog)(x) substitute the g(x) into f(x) that's for every x in f (x) replace it with
g (x).
That's
(fog)(x) = x² - 2
To find (fog)(-1) substitute the value of x that's - 1 into (fog)(x)
We have
(fog)(-1) = (-1)² - 2 = 1 - 2 = - 1
Hope this helps you
10 less than a number is the same number doubled. What is the number?
Answer:
-10
Step-by-step explanation:
Let x = number
10 less than a number is the same number doubled
x-10 = 2x
Subtract x from each side
x-10-x = 2x-x
-10 = x
The number is -10
what is the measure of ABD
Answer:
Hey there!
The measure of angle ABD plus the measure of angle CBD equals 90 degrees or a right angle.
Thus, we can write the equation: ABD+51=90
Solving for ABD, we find that it is 39 degrees.
Let me know if this helps :)
the value of ∠ABD is 3[tex]9^{o}[/tex] degrees.
What is right angle?A right angle is an angle of 90°. When two rays intersect and form a 90˚ angle or are perpendicular to each other at the intersection, they are said to form a right angle.
according to given figure
The measure of angle ∠ABD plus the measure of angle ∠CBD equals 90 degrees or a right angle.
Thus, we can write the equation: ∠ABD + ∠CBD = 9[tex]0^{o}[/tex]
∠ABD + 5[tex]1^{o}[/tex] = 9[tex]0^{o}[/tex]
∠ABD = 9[tex]0^{o}[/tex] - 5[tex]1^{o}[/tex]
∠ABD = 3[tex]9^{0}[/tex]
Hence, the value of ∠ABD is 3[tex]9^{o}[/tex] degrees.
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A group of pirates found Treasure worth $540 the pirate the 4 Pirates each get to take the same amount of treasure home for the night. How much treasure did each pirate get to take
Answer:
$135
Step-by-step explanation:
what is w increased by 15 written out
Answer:
[tex]\Huge \boxed{w+15}[/tex]
Step-by-step explanation:
The number w is increased by 15.
15 is added to w.
[tex]\Rightarrow w+15[/tex]
Answer:
wwwwwwwwwwwwwww
Step-by-step explanation:
you said 15 w's
A cube with an edge of length has a volume of 64 units. What is the length of ? Hint: Volume of a cube is LxWxH.
Answer:
it is 4
Step-by-step explanation:
Express the quotient of r to the power of six sevenths divided by r to the power of two sevenths as a radical
Answer:
See below (I hope this helps!)
Step-by-step explanation:
When dividing exponents of the same base, we can simply subtract the powers so the new power would be 6 / 7 - 2 / 7 = 4 / 7, hence we need to write [tex]r^{\frac{4}{7} }[/tex] as a radical. When writing fractional exponents as radicals, the denominator of the fractional exponent is the index of the radical and the numerator is the exponent of the base inside the radical, hence, our answer is [tex]\sqrt[7]{r^{4} }[/tex].
f(x) = x^2 + 3 g(x) = 4x - 3 Find (f°g)(-1)
a. 4
b. -52
c. -4
d. 52
Answer:
Step-by-step explanation:
g(-1) = 4(-1) - 3 = -4 -3 = -7
f(-7) = (-7)^2 + 3 = 49 + 3 = 52
Answer is D
4. which of the following is the correct notation for 15-sqr-32
5. which of the following is equivalent to sqr-63
Answer:
See below.
Step-by-step explanation:
4.
[tex] 15 - \sqrt{-32} = 15 - \sqrt{-1 \times 16 \times 2} = 15 - 4i\sqrt{2} [/tex]
5.
[tex] \sqrt{-63} = \sqrt{-1 \times 9 \times 7} = 3i\sqrt{7} [/tex]
6.
[tex] \sqrt{-100} + 26 = \sqrt{-1 \times 100} + 26 = 10i + 26 = 26 + 10i [/tex]
easy 10 points and brainliest :)
Answer:
on the x-axis
Step-by-step explanation:
If x is less than 0, that means it's to the left of the origin, and if y = 0, then that means the point lies on the x-axis. Hence, (x,y) is on the x-axis.
Cheers.
Find the angles x and y in following figure.....correct answer will be mark BRAINLIEST and be followed...
Answer:
<CTS=180-(35+31) (sum of <s in a triangle)
=180-66
=114 degrees
x=180-114 (angles on a straight line)
x=66 degrees
<TSR=180-(30+36)
=180-66
=114 degrees
<TSA=180-114
=66 degrees
y=180-(66+66)
y=180-132
y=48 degrees
Jai and kim need to collect cans of food for a food drive. Jai collect 65/100 of the total cans needed, and kim collects 2/10 of the total cans needed. What fracion of the total number of cans did they collect altogetther
Answer:
17/20
Step-by-step explanation:
Add 65/100 to 2/10
65/100 + 2/10 = 65/100 + 20/100 = 85/100 = 17/20They collected 17/20 of cans of food altogether
Which of the following numbers is closest to 5?
A. V23
B. V26
C. V22
D. V28
Answer:
B
Step-by-step explanation:
V26 is closer to 5 because it's only one number away.
The number among the option that is closest to 5 is √26.
How to find the number closest to 5?The number closest to 5 is the number that is almost 5.
The option are express in surd form, therefore, lets express in real numbers(decimal form) Real numbers are rational or irrational numbers. Therefore,
√23 = 4.79583152331
√26 = 5.09901951359
√22 = 4.69041575982
√28 = 5.29150262213
Therefore, using the decimal form, the closest number to 5 is √26
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Alicia is thinking of a number for her friends to guess. She tells them the number is the least common multiple of 3 and 7. Which number is Alicia thinking of?
Answer:
21
Step-by-step explanation:
Multiples of 3: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ...
Multiples of 7: 7, 14, 21, 28, 35, 42, 49, 56, ...
We see that the first number that is a multiple of both 3 and 7 is 21.
5 + 3x – 2x = 31 – 6 – 5
What is the answer?
Answer:
x=15
Step-by-step explanation:
i just know its right
A species of phytoplankton measures about 2 × 10−6 in. A grain of sand measures about 1 × 10−4 in. About how many times longer is the grain of sand than the phytoplankton?
Answer : The grain of sand is 50 times greater than the phytoplankton.
Step-by-step explanation :
As we are given that:
Size of phytoplankton = 2 × 10⁻⁶ in
Size of sand grain = 1 × 10⁻⁴ in
Now we have to determine how many times longer the grain of sand is than the phytoplankton.
We are dividing the sand grain size by the phytoplankton size.
This can be done by equating it as follows:
[tex]\frac{\text{Size of sand grain}}{\text{Size of phytoplankton}}=\frac{1\times 10^{-4}in}{2\times 10^{-6}in}[/tex]
[tex]\frac{\text{Size of sand grain}}{\text{Size of phytoplankton}}=50[/tex]
Therefore, the grain of sand is 50 times greater than the phytoplankton.
Fatima has 1/2 gallon of milk she wants to pour all milk into 6 glasses what fraction of a gallon should she pour into each glass
Answer:
4/5
Step-by-step explanation:
1/2÷6=0.8333333...
0.8333333...as a fraction is 4/5
Answer:
1/2
Step-by-step explanation:
What is 3 2/5 as a decimal?
Answer:
3.4
Step-by-step explanation:
2/5 as a decimal is 0.4, and we can add 3 to it, getting 3.4
A preschool has a student to teacher ratio of 5:2. Yesterday, the total number of students was 55, how many teachers are at the preschool?
WILL GIVE BRAINLIEST!!!!!!!!!
Explain how you find the scale factor using 2-3 sentences or showing each step. Explain using the ratio of the image length to the pre-image length.
Answer:
2
Step-by-step explanation:
The scale factor can be determined by simplifying the ratio of the corresponding length of the preimage to that of the image.
The preimage is the smaller shape shown, while the image is the lager shape shown.
Any side length can be used.
Thus, length of one side of the preimage, AD = 4 - 1 = 3 units
AD corresponds to side length A'D' if the image = 7 - 1 = 6 units
The ratio of the image length to the ratio of the preimage length = the scale factor
Thus:
6 : 3 = [tex] \frac{6}{3} = 2 [/tex].
The scale factor is 2.
Kirima is building a wall for her snow fort. She first makes a firm base out of snow, and then piles uniformly sized blocks of snow in a
brick-like pattern. She has a maximum height for this wall in mind, and she wants to figure out how many blocks can be stacked vertically
in her wall while remaining below this maximum. So, she constructs the expression 0.6x+0.4 to measure the height of her wall, where all
constants represent measurements in meters. Which of the following statements are true?
Select all that apply.
Answer:
0.4 represents the height of the base.
0.6 represents the height of each block.
Step-by-step explanation:
In this expression the x is the number of blocks which is multiplied with the height of the block and added to the height of the base to get the total height of the wall.
Suppose we have ten blocks so
0.6x+ 0.4 = 0.6(10)+ 0.4= 6+0.4= 6.4
The height of the wall would be 6.4 if there are ten blocks.
The height of the wall depends on the number of blocks used.
The height of the base is constant irrespective of the number of blocks used.
Answer:
0.4 represents the height of the base.
0.6 represents the height of each block.
Step-by-step explanation:
Expression: (3215 - 3052) * 15
The value of the expression is
Answer:
2,445
Step-by-step explanation:
PEMDAS:
(3215 - 3052) * 15 =
163 * 15 =
2,445
Hope this helps.
Answer:
I think Its 24.45
Step-by-step explanation:
I did my best
I know the answer show me how you solve it
Step-by-step explanation:
It's basically [tex]3\sqrt{3} - 1\sqrt{3}[/tex] which is just 3 - 1 since the radicals are the same.