what is the value of this expression below when z=3
10z^2-2z-2
Answer:
82
Step-by-step explanation:
10z^2-2z-2
10x3^2-2x3-2
90-6-2
90-8
82
Answer:
82
Step-by-step explanation:
Evaluate 10z² - 2z - 2 where z = 3:
[tex] \longrightarrow [/tex] 10z² - 2z - 2 = 10 × 3² - 2 × 3 - 2
3² = 9:
[tex] \longrightarrow [/tex] 10 × 9 - 2 × 3 - 2
10 × 9 = 90:
[tex] \longrightarrow [/tex] 90 - 2 × 3 - 2
-2 × 3 = -6:
[tex] \longrightarrow [/tex] 90 - 6 - 2
90 - 6 - 2 = 90 - (6 + 2):
[tex] \longrightarrow [/tex] 90 - (6 + 2)
6 + 2 = 8:
[tex] \longrightarrow [/tex] 90 - 8
[tex] \longrightarrow [/tex] 82
Substitution method
3x+2y=15
y=6x
Answer:
x = 1
Step-by-step explanation:
3x +2y = 15
y = 6x
Substitute y for 6x in 3x +2y = 15!
3x + 2(6x) = 15
3x + 12x = 15
Combine like terms
15x = 15
Divide both sides by 15
15x = 15
x = 1
Brainliest is much appreciated!
Solve the proportion!
Answer: 13
Step-by-step explanation: i googled it
2x=17 what is the value of x
Answer: X = 8.5
Step-by-step explanation:
2x = 17
divide by 2
x = 8.5
By solving the value we get the value of x that is equal to 8.5.
Calculating the value of x:When considering unknown values, the value of x is used. In algebra, the letter "x" is frequently used to denote an unknown value. It's called a "variable" or an "unknown" in other circumstances.[tex]\to[/tex] 2x=17
[tex]\to[/tex] x=[tex]\frac{17}{2}[/tex]
[tex]\to[/tex] x=8.5
Find out more about the value of x here:
brainly.com/question/14170328
subtract 11 from 111 in base two
Answer:
11-111=0b1100100
Write an expression that has a value of -8.
Answer/Step-by-step explanation:
[tex]-4^{3}[/tex] ÷ 2 ÷ 4
-4 x -4 x -4 = -64 -64 ÷ 2 = -32 -32 ÷ 4 = -8solve for x : 4 (1 - x) + 2x = -3 (x+1)
Answer: x=-7
Step-by-step explanation:
Which statement(s) could be used in a proof with the reason CPCTC after proving ΔABC≅ΔEFG? (Check all that apply) *
AC ≅ EG
AB ll EF
BC ≅ FG
∠BCA ≅ ∠FGE
∠CBA ≅ ∠GEF
Answer:
The statements(s) that could be used in a proof with the reason Corresponding Parts of Congruent Triangles are Congruent (CPCTC) are;
AC ≅ EG
BC ≅ FG
∠CBA ≅ ∠GEF
Step-by-step explanation:
CPCTC is a phrase that stands for Corresponding Parts of Congruent Triangles are Congruent. It can be used as a bases for congruent relationships of corresponding angles and segments, after two triangles have been proven as congruent
Given ΔABC is congruent to ΔEFG, we have by CPCTC;
Side AB ≅ Side EF
Side AC ≅ Side EG
Side BC ≅ Side FG
∠A ≅ ∠E
∠B ≅ ∠F
∠C ≅ ∠G.
For each equation, determine whether it has no solutions, exactly one solution, or is true for all values of x (and has infinitely many solutions). If an equation has one solution, solve to find the value of x that makes the statement true.
6 x + 8 = 7 x + 13
6 x + 8 = 2 ( 3 x + 4 )
6 x + 8 = 6 x + 13
Answer:
Equation 1 has exactly one solution.Equation 2 has infinitely many solutions.Equation 3 has no solution.Step-by-step explanation:
We are given three equations to solve. First, let's solve the equations for x.
Equation 1
[tex]\displaystyle{6x+8=7x+13}\\\\7x + 13 = 6x + 8\\\\x + 13 = 8\\\\\bold{x = -5}[/tex]
Therefore, we determined that for the first equation, x = -5. We can check our solution by substituting it back into the original equation.
[tex]\displaystyle{6(-5)+8=7(-5)+13}\\\\-30 + 8 = -35 + 13\\\\-22 = -22 \ \checkmark[/tex]
Since we got a true statement, there are no other values of x for which we get a true statement. Let's test this with the opposite value: positive 5.
[tex]6(5)+8=7(5)+13\\\\30 + 8 = 35 + 13\\\\38 = 48 \ \text{X}[/tex]
Therefore, for Equation 1, there is exactly one solution.
Equation 2
[tex]6 x + 8 = 2 ( 3 x + 4 )\\\\6x + 8 = 6x + 8\\\\0 + 8 = 8\\\\8 = 8 \ \checkmark[/tex]
We get a true statement by solving for x (which ends up canceling out of the equation entirely). Therefore, we can check any value in place of x to see if we get a true statement. For this instance, I will use -3.
[tex]6(-3) + 8 = 2 ( 3(-3) + 4 )\\\\-18 + 8 = 2(-9+4)\\\\-18 + 8 = 2(-5)\\\\-18 + 8 = -10\\\\-18 = -18 \ \checkmark[/tex]
We still get a true statement, so Equation 2 has infinitely many solutions.
Equation 3
[tex]6 x + 8 = 6 x + 13\\\\0 + 8 = 13\\\\8 \neq 13[/tex]
We get a false statement. Therefore, Equation 3 has no solution.
20 pointsBRAINLEST!!!!!!!!!! and PointsAfter an accident, police can use the formula v=25L to estimate the speed, v, in miles per hour, that a car was traveling by measuring the length of the skid marks, L, in feet. Estimate the speed of a car that left skid marks 118 ft long. If the posted speed limit is 45 mi/h, was the car speeding? The speed of a car that left skid marks 118 ft long was about nothing mi/h.
The correct format of the question is
After an accident, police can use the formula [tex]v=2\sqrt{5L }[/tex] to estimate the speed, v, in miles per hour, that a car was traveling by measuring the length of the skid marks, L, in feet. Estimate the speed of a car that left skid marks 118 ft long. If the posted speed limit is 45 mi/h, was the car speeding? The speed of a car that left skid marks 118 ft long was about nothing mi/h.
Answer:
48.6mi/h, Yes the car was speeding.
Step-by-step explanation:
The speed of the car is given by [tex]v=2\sqrt{5L }[/tex]
Skid length (L) = 118ft
V= [tex]2\sqrt{5*118}[/tex]
= 2 [tex]\sqrt{590}[/tex]
= 2*24.3
V = 48.6mi/h
Since the speed limit is 45mi/h and the velocity of this driver is 48.6mi/h it is clear that was speeding by 3.6mi/h over speed limit.
4x + 5y = 30
5x + 3y = 31
Answer:
y=2
x=5
trust me its by calculator
Answer:
x=5
y=2 true......
Step-by-step explanation:
.............
Graph the inverse function of f(x) = 2x + 4.
Answer:
Step-by-step explanation:
Answer:
Look at the graph, because I got it wrong I hope you guys get it! :)
Step-by-step explanation:
Helppoo 10 points! I’ll mark brainliest!
Answer Yes, because you take the answer from 100+45 and subtract 3 to get to 97 and then you add 29 to make the 47 a 74.
Step-by-step explanation:
The sum of three numbers is 123. The third number is 3 times the second. The second number is 8 less than the first. What
are the numbers?
2) MULTIPLE CHOICE: Find the value of y in the triangles.
A. 10/3
B. 10v2
C. 20V2
D. 106
Item 19
Write the word sentence as an equation. Then solve.
The sum of a number y and −3 is −8.
Equation:
Solution: y=
Answer:
The answer is
Equation: y+-3=-8
Solution: y= -5
Step-by-step explanation:
Hope this helps!
I need help with this, could you just give me the answers? You don't need to show work
Answer:
9) B= 115 / C= 65 / D=135 / E= 115 / F=25
10) B= 110 / C= 70 / D=1120 / E=70 / F= 20
11) A= 68 / B= 112 / C= 68 / D=112 / E= 68
12) A= 64 / B=116 / C= 64 / E=64 / F=26
Step-by-step explanation:
9) B= 115 / C= 65 / D=135 / E= 115 / F=25
10) B= 110 / C= 70 / D=1120 / E=70 / F= 20
11) A= 68 / B= 112 / C= 68 / D=112 / E= 68
12) A= 64 / B=116 / C= 64 / E=64 / F=26
(7x10^-6) (8x 10^-5)
Answer:
56x^2 + 10^-11
Step-by-step explanation:
multiply the 7x and 8x and you get 56x^2
multiply the 10^-6 and 10^5-5 and you get 10^-11
Q1. A fluorescent lamp takes in energy from the electricity supply at the rate of 18 joules each second. It gives out 3 joules of energy as light each second.
a. How much energy does the lamp give out each second?
Answer:
15 joules
Step-by-step explanation:
SUBTRACT 3 FROM 18
18 JOULES-3 JOULES=15 JOULES
HOPE IT HELPS
Rondell's parents barrow 6,300 from the bank for a new car the interest rate is 6%per year. How much simple interest will they pay if they take 2years to repay the loan
Answer:
756Step-by-step explanation:
The simple interest can be found by using the formula
[tex]I = \frac{p \times r \times t}{100} \\ [/tex]
p is the principal
r is the rate
t is the time
From the question we have
[tex]I = \frac{6300 \times 6 \times 2}{100} = \frac{75600}{100} \\ [/tex]
We have the final answer as
756Hope this helps you
Which describes how to graph h(x)= –RootIndex 3 StartRoot x EndRoot + 3 using transformations of the parent function? Reflect over the horizontal axis, and then translate the graph right 3 units. Reflect over the horizontal axis, and then translate the graph up 3 units. Reflect over the vertical axis, and then translate right 3 units. Reflect over the vertical axis, and then translate up 3 units.
Reflect over the horizontal axis, and then translate the graph up 3 units
Answer: Reflect over the horizontal axis, and then translate the graph up 3 units.
I need help plzzzzzzzzzzzzzzzzz
Answer:
x=21
Step-by-step explanation:
I think we are supposed to assume that is a right angle which means 90-6= 84
84/4= 21
I AM BEING TIMED HELP!!!
What is one main objective in the study of economics?
recognizing the types of services available to everyone
recognizing the relationship between producers and consumers
recognizing the reasons why consumers supply services
recognizing the difference between producers and consumers
Answer:
C
Step-by-step explanation:
What is the equation of this graphed line?
Answer:
[tex]y=-\frac{9}{8} x+7[/tex]
Step-by-step explanation:
The slope is found by doing the equation [tex]\frac{rise}{run}[/tex]. When looking at the first two points, it's shown that the rise (difference between the two y values) is -9 (since it decreased by 9) and the run (difference between the two x values) is 8 (since it increased by 8). This makes the slope equal [tex]-\frac{9}{8}[/tex].
The y intercept is found by looking at the y value when x = 0. In this picture, it is clear that it is 7.
The equation you want to use is y = mx + b , where b is the y intercept and m is the slope. Just plug in the numbers and you got your equation!
What’s the expression of this in simplest form
Answer:
3/17
Step-by-step explanation:
3/4 divided by 4 1/4 is = to 3/4 divided by 17/4= 3/4 times 4/17 = 3/17
Find the slope of the line passing though points (-7, 8) and (5, -7).
Answer:
13/13= Slope = 1
Step-by-step explanation:
M=rise/run, So that means 13 down then 13 to the left.
So 13/13 is the slope, but if it is simplified it is slope=1
chemical formula for lithium bromide
Answer:
The molecular or chemical formula of Lithium Bromide is LiBr. Lithium Monobromide is synthesized by treating lithium carbonate (Li2CO3) with hydrobromic acid (HBr). The salt forms cubic crystals which are similar to sodium chloride.
Step-by-step explanation:
hope this helped:)
Answer:
lithium bromide is a chemical compound of lithium and bromine
Step-by-step explanation:
Br-Li+
will give brainliest!!! hurry up and solve it plzz
Answer:
8
Step-by-step explanation:
we can say that AD is congruent to DC
so your equation for x is: 4x - 1 = 2x
solve this to get x = 0.5
plug x into and equation and multiply you answer by 2 to find the hypotenuse of triangle ABC and DEF
4(0.5) - 1 = 1
hypotenuse: 1 x 2 = 2
since we know x is 0.5, plug this into 4x + 1 to find the length of the leg FE,
4(0.5) + 1 = 3
In the diagram, it shows that the legs of triangle are congruent
this means that FE, ED, BA, and BC are all congruent
since we know FE is 3, we know that all the other sides are 3 as well
this means that the perimeter of the triangle is: leg + leg + hypotenuse
so 3 + 3 + 2
the perimeter is 8
I REALLY NEED THIS DONE RIGHT NOW
evelyn knits hats and scarves for charity. she records the time it takes and the amount of yarn needed to make one of each item. Last winter Evelyn knitted for 180 hours. She used 2,520 yards of yarn. How many hats and scarves did Evelyn knit? (it has the data)
Answer:
It is midpoint, vertex, and medians in that order.
Step-by-step explanation:
there
Answer:
[tex]Evelyn \: knit \: made \to \\ \boxed{12 }\: hats \: and \: \boxed{8 } \: scarves[/tex]
Step-by-step explanation:
[tex]let \: the \: hats \: be \to \: h \\ let \: the \: scarves \: be \to \: s \\ then \to \\ 5h + 15s = 180.....(eq .1) \\ 110h + 150s = 2,520.....(eq .2) \\ from \: .....(eq .1) \\ 15s = 180 - 5h \\ s = \frac{180 - 5h}{15} .....(eq .3) \\ equating \: .....(eq .3) \: in \: .....(eq .2) \\ 110h + 150( \frac{180 - 5h}{15} ) = 2,520 \\ 110h + 10(180 - 5h) = 2,520 \\ 110h + 1800 - 50h= 2,520 \\ 60h = 2520 - 1800 \\ 60h = 720 \\ \boxed{h = 12} \\ applying \: \boxed{h} \: in \: .....(eq .3) \\ s = \frac{180 - 5(h)}{15} \\ \\ s = \frac{180 - 5(12)}{15} \\ \\ s = \frac{120}{15} \\ \boxed{ s = 8}[/tex]
♨Rage♨
Help plz plz plz plz
Answer:
.4 and it terminates
Step-by-step explanation:
Answer:
red
Step-by-step explanation: